PDF malware analysis — malicious · ea24d9b7c1bc4a48

MALICIOUS

PDF

230.8 KB Created: 2021-07-17 17:12:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25

MD5: b393313a5d3f01c04966e18aa3db66b1 SHA-1: 675f0afc631da62bdd5c42f0ff53c11d78929623 SHA-256: ea24d9b7c1bc4a48ab3e9f96eea4fe745dcfcbb51b5a34d83dbde2e74bf633a0

136 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV, specifically as a phishing trojan. It contains multiple external links, with a critical heuristic identifying a link to a compromised WordPress upload storage. This suggests the document is intended to lure users into clicking malicious links, likely for phishing or to download further malware. No scripts were extracted, but the presence of external links and the ClamAV detection strongly indicate malicious intent.

Machine Learning

Nyx PDF Classifier clean score 0.2198

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK

PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/b9d31ac3a983ef5f8459d6e3b447fb64/82980037487.pdf In PDF document text
- http://zonweringbelgie.nl/ckfinder/userfiles/files/wavosorajo.pdfIn PDF document text
- https://renebeumer.nl/userfiles/file/rejopetikedimolig.pdfIn PDF document text
- http://sacoorhealth.pt/site/upload/file/62854494705.pdfIn PDF document text
- https://phoenixturkey.com/upload/ckfinder/files/kobewerep.pdfIn PDF document text
- http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f54619013b---junukipaguzadinibojax.pdfIn PDF document text
- https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160acb1e20b705---65208742039.pdfIn PDF document text
- https://acryl-bg.com/userfiles/file/4879392097.pdfIn PDF document text
- http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160be84fe37a60---12102652659.pdfIn PDF document text
- https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607c8d4650660---7252992135.pdfIn PDF document text
- https://www.varisistanbul.com/wp-content/plugins/formcraft/file-upload/server/content/files/160729b0726339---belugijabufoligukegudif.pdfIn PDF document text
- http://4x4autok.hu/userfiles/files/sowepex.pdfIn PDF document text
- http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160e688e77b5d2---83065317172.pdfIn PDF document text
- https://cristalensi.com/public/File/93732152923.pdfIn PDF document text
- https://5a.ro/ckfinder/userfiles/files/1813961858.pdfIn PDF document text
- http://dashoernerboot.de/userfiles/sadoxilafosef.pdfIn PDF document text
- http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd98f63370---25374581408.pdfIn PDF document text
- https://anmimar.com/royal/userfiles/file/manaxamabafojepirof.pdfIn PDF document text
- https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/a2d7e547788ac75a5c3a5af4afdf58e6/wejimul.pdfIn PDF document text
- http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3f6a9c847---tedeziwifufalixolikom.pdfIn PDF document text
- http://oikoscoccatoarchitettura.com/userfiles/files/76679931950.pdfIn PDF document text
- http://developmentassociationofnagaland.org/nbloom/fckuploads/file/73340887978.pdfIn PDF document text
- http://usaoxin.com/userfiles/2021-5/file/26251635142.pdfIn PDF document text
- https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc7ae42fa3---75545135927.pdfIn PDF document text
- http://polipack.ru/content/file/pegamurazopixexobizuk.pdfIn PDF document text
- https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b9495c31555---raboxoxifekur.pdfIn PDF document text
- https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a33c0d089---14301128711.pdfIn PDF document text
- https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/5bcfa86cf8e9c06cd598ce0b4591da7d/26549367931.pdfIn PDF document text
- http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608464d0ccdeb---falefurit.pdfIn PDF document text
- https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/7k6pdutvep97vi13pk8rb0ubf2/52092915994.pdfIn PDF document text
- http://nmglyxx.com/userfiles/file/baditovavigefo.pdfIn PDF document text
- https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/4d613d1202d198915e015b7c0964297d/51465889114.pdfIn PDF document text
- http://lateonsettay-sachs.org/userfiles/file/minibu.pdfIn PDF document text
- http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b9bf6d983---29908203383.pdfIn PDF document text
- https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076056608949---84428753789.pdfIn PDF document text
- https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4493304448---sivugikudubo.pdfIn PDF document text
- http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16072ef613a402---fogoxamemarowip.pdfIn PDF document text
- http://aaz.sk/editor_uploads/files/xikefojubox.pdfIn PDF document text
- http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160768c00d3f32---jorumiluwuxafimap.pdfIn PDF document text
- http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608e65f66a16b---24258265609.pdfIn PDF document text
- https://sunarchegypt.com/userfiles/file/65391055285.pdfIn PDF document text
- http://centreforeffectivecoaching.com/media/file/138363955.pdfIn PDF document text
- http://0-50.ru/userfiles/file/20918582393.pdfIn PDF document text
- https://karinbentum.nl/uploads/file/wejarilefek.pdfIn PDF document text
- https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/5e859aa8ce9c5213f72e9b9077406913/74337557127.pdfIn PDF document text
- https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/a7f6cdf78177a83da7c77cb52fce0d15/pakodalewagamixovow.pdfIn PDF document text
- http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609689fad5086---fovureg.pdfIn PDF document text
- http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/5g8e0h2ecpp80fc5hft0togp90/61842613679.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=the+first+avenger+full+movie+downloadPDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
+7 more URL(s)

Extracted artifacts 7

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000eaf0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEAF0	17760 bytes
SHA-256: `2c1c49bea6b823fddc9131cb19466015ef762a6bb94b90fbc71a80fe1ccd6032`
`font_01_sfnt_off0001194a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1194A	11016 bytes
SHA-256: `b4e32ad077ff4b7cf882e2b2ccb3072c93c0b05881a66481830ba5e53c3cd732`
`font_02_sfnt_off0001329a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1329A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off00016457.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16457	10400 bytes
SHA-256: `c648de9b955e4249ac98df77aa6cab078d939aa3f131c1fd8ce8ff0a79e88925`
`font_04_sfnt_off00017bfc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17BFC	17480 bytes
SHA-256: `9b86b88b2031cce94b796679985f0912a0011c51f5bd49e23af184c4565fcb23`
`font_05_sfnt_off000329b2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x329B2	10728 bytes
SHA-256: `ce05e320b0dfae212b49670404968e420a1c9bdd75541179ceed53f33497b0db`
`font_06_sfnt_off00034246.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x34246	19832 bytes
SHA-256: `fc01724bca5714901479bae3c88640cef55f7b0043e965a965155f6d65679e66`

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