Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcd22aaf45acd25a…

MALICIOUS

PDF

89.8 KB Created: 2021-07-07 22:48:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 29d7baed19aca7d9c4b1e37e5d72a0d1 SHA-1: f29f072f3ec6192c6aca15d083e644e20f9ef803 SHA-256: fcd22aaf45acd25a9bcb0e7e2e4ab38bc241eaff618521c1c7653fc4428736fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a phishing lure or a distribution point for further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://synerhu.ru/uplcv?utm_term=munsters+house+today
    • http://atut-biuro.com/uploaded/file/gutinenotubuwutexaviloxu.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/3df590188819d5b8fde3a748607fe14e/xutixisodumuwe.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/7a27b73d26f649d5612d146639a93dc2/murukedufomafasimofuz.pdf
    • https://aneri12.cz/res/file/28592693982.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b893387700---tumirojovajebipesu.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608009ed64f7f---23163855850.pdf
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/ehrl3vaqhk12dj6fe0v3aktio5/66165566074.pdf
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/7ce45243d076fdf8852178fb43f8fec2/ferojiweb.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/77k95roki60ds0tch92kj3c1p3/wupelimesizokazumot.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e073b2691d8---xoxidekepakizi.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fea91cd358---26554376750.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab23f0de203---pogenofobezuzafebi.pdf
    • https://grupo-kayros.com/userfiles/file/66800172950.pdf
    • http://elementsgogreen.com/userfiles/file/dobibimujeko.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160829a899a5ce---kejugoburetisijovifipipo.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085931c5977c---95723002253.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/cda4aa35361b3a730e8c36eef99de824/29107181694.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d995cce00---puwonilex.pdf
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16095e51913a9b---43805167290.pdf
    • http://maketmaster.ru/admin/ckfinder/userfiles/files/ropox.pdf
    • https://heyratacademy.ir/file/76165571336.pdf
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/kjf8pe3m55pfov00akee743ltb/8412916004.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa76.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA76 16792 bytes
font_01_sfnt_off00011288.bin
66cbeca73f959badafd956566ee4ed32d05259cfc3da1ef4af517f18e397e02a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11288 18276 bytes
font_02_sfnt_off000142cc.bin
4b9aa64aeb42058feecbc8aed6ebae722ce4dc11ed06b06f070680484627b42c
pdf-font-stream PDF embedded font (sfnt) at offset 0x142CC 10416 bytes