PDF malware analysis — malicious · eb9dc0269aeb9d7a

MALICIOUS

PDF

86.5 KB Created: 2021-08-02 07:55:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: f7a4353d440fea264e323c15f15c8bad SHA-1: 78dd0b1a5333e8dbd44b2ea96164d8d41a9bc054 SHA-256: eb9dc0269aeb9d7a3b14a475f92dee940a4a7fbdaf45a05bb8d1e95012c97545

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites, suggesting an attempt to obscure the ultimate destination. The presence of embedded URLs and the nature of the heuristics indicate a likely phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9922

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 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.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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://oniceh.ru/uplcv?utm_term=download+lagu+kun+anta+versi+indonesia+mp3+planetlagu PDF link annotation
- http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/161006a6cddd8e---79987728341.pdfIn PDF document text
- https://postelezmasivu-liberec.cz/ckfinder/userfiles/files/40774203837.pdfIn PDF document text
- http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160e688a4702aa---wozejemo.pdfIn PDF document text
- https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e3e72ef1d---fupusiwatidudebof.pdfIn PDF document text
- http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608d96570183d---50010165913.pdfIn PDF document text
- https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/ejei466p7427n3rhgg571fth3m/11398823627.pdfIn PDF document text
- http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa29a3bc5bf---mekutajoxaxosafolepifus.pdfIn PDF document text
- https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a861802b88f---refomidubejinep.pdfIn PDF document text
- http://studiogeologicotrilobite.com/userfiles/files/5111559627.pdfIn PDF document text
- http://lamekatus.ee/uploads/ckeditor/files/limalume.pdfIn PDF document text
- https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/lgmnlki981q86gle33e6g4mode/tepowenuti.pdfIn PDF document text
- http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2c66871fb---jenawoxekut.pdfIn PDF document text
- https://rhodium.vn/uploads/news_file/38312356067.pdfIn PDF document text
- https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/6mik23sjge5d05vv1e8s6rgqfv/sefiroxil.pdfIn PDF document text
- http://hutbephottaihaiphong24h.com/upload/files/91715170158.pdfIn PDF document text
- http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e7c3df10d32---tesukojur.pdfIn PDF document text
- https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ae328963fed83c4e538dfb3329dcf0e8/mefupubiduwekebuvi.pdfIn PDF document text
- http://phunggia.biz/userfiles/file/bokejogilojariroratudeb.pdfIn PDF document text
- http://baggiez.net/userfiles/file/kojosopenoxafobamenesulo.pdfIn PDF document text
- https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160a15a1b5043d---kamosu.pdfIn PDF document text
- https://visualmotion.nl/uploads/file/paboziwajatanajamiwisit.pdfIn PDF document text
- https://nakipoglugroup.com/upload/ckfinder/files/50012414966.pdfIn PDF document text
- https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/da823c516f1074e6803461a20d69d482/jeziwevobaxunasobiwozimut.pdfIn PDF document text
- https://protradingindia.net/userfiles/file/39662672095.pdfIn PDF document text
- http://shahnawazonline.com/uploads/files/bubuxidew.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off0000ff7a.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xFF7A	18320 bytes
SHA-256: `d33c2b3af7c20041430fd52bc9bf9af55e1929e25e45ae8b1f9a1250ee9ba20a`
`font_00_sfnt_off0000cd21.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCD21	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e538.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE538	11252 bytes
SHA-256: `c5bf404326e6f9fa719105f2069995b6bbfb504e275a74e0bbc851e6f3773e91`
`font_03_sfnt_off00011c6d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11C6D	17816 bytes
SHA-256: `21f8542698ef1fba7d1ee6570519f54c8f0c5e9660e607571d1774ff55bf870b`

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