PDF malware analysis — malicious · 89630ffa250e75fa

MALICIOUS

PDF

83.3 KB Created: 2021-09-12 12:48:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: a586bd9f1bda00ce8862004e5845b2f3 SHA-1: a8fef3f2c49c7d5ebb3f44ae2c9780d1dc8ae473 SHA-256: 89630ffa250e75faf1f8ae4ccabaa5a7ff38634dc8261d59b25efcaaaf310f97

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to potentially compromised or disposable hosting sites. The document body is unreadable, but the presence of multiple external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

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 http://dentistturkey.com/image/files/16593636781.pdf In PDF document text
- https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca8ce44e46---vexurajewox.pdfIn PDF document text
- https://francemonde.news/UserFiles/file/20366094527.pdfIn PDF document text
- http://gutachterbewertung.de/userfiles/file/toguradiriwuputewowap.pdfIn PDF document text
- http://bronnicy.inhome360.ru/admin/ckfinder/userfiles/files/lewemigemujo.pdfIn PDF document text
- http://capri.lt/userfiles/files/13205701166.pdfIn PDF document text
- http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138ceb02538a---50904387369.pdfIn PDF document text
- http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16132d0ba0380b---10075258485.pdfIn PDF document text
- http://www.la-rocca.pl/app/webroot/files/files/47725475535.pdfIn PDF document text
- http://dreambeauty.kr/upload/fckeditor/file/54827087508.pdfIn PDF document text
- http://madmojo.com/fckupload/file/zapejikofixepuguga.pdfIn PDF document text
- https://tipresentoio.it/images/file/23025659408.pdfIn PDF document text
- http://clinicaveterinariacene.com/userfiles/files/dubixuliwenajazolaze.pdfIn PDF document text
- https://cowichanseniors.ca/userfiles/file/wifurojuwupiwowu.pdfIn PDF document text
- https://rosanaalvarracin.com/userfiles/file/wazetobovaluzalidodipen.pdfIn PDF document text
- https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/91f31eba60e9fe7d33f6e506fffa1414/38506668729.pdfIn PDF document text
- http://nato-denkmal.de/uploads/file/roboxoxefidiloti.pdfIn PDF document text
- https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/7375dd5274258b494edf79246cdf9efa/59959015986.pdfIn PDF document text
- http://xn--q20b13r9leepaeb.net/upload/file/202109091207489583.pdfIn PDF document text
- https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/158bdf012e310b551aadfe566fe8c4d2/81645980605.pdfIn PDF document text
- http://bimbrlata.cz/UserFiles/File/vigazexugudadevaxobada.pdfIn PDF document text
- https://ventadeterrenosurbanos.com/userfiles/file/fobetenawix.pdfIn PDF document text
- http://www.shjkyq.com/up_files/FCK/file/88606503002.pdfIn PDF document text
- http://studioingegneriavaragnolo.com/userfiles/files/19871650950.pdfIn PDF document text
- https://korankertas.com/contents/files/desererisudewijetabukawa.pdfIn PDF document text
- https://calmoinc.com/upload/editor/file/79086578073.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=ipad+side+by+side+comparisonPDF link annotation
- 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e316.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE316	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fb28.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB28	16908 bytes
SHA-256: `8e841a7bf4a1d3e64c808597c22127d66bac592b0daad44c7f298585835cd5ee`
`font_02_sfnt_off000126bd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x126BD	10736 bytes
SHA-256: `3b1806e0603bff1203509503417be30af691e473a224359a6be73c3b95639cd0`

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