Malicious PDF — malware analysis report

Static analysis result for SHA-256 f269ce907676cd3a…

MALICIOUS

PDF

79.5 KB Created: 2021-07-07 19:00:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3a2287ddce6732c5321bc1c0f3bedebe SHA-1: 2d6f0ad98c5d9f3dc7914178f6bc24b25b549ff6 SHA-256: f269ce907676cd3a51a2a8efda1e8f9456ea33a8b497927dcbdc006e1c07a7dd
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. Static analysis revealed multiple heuristics indicating a link farm hosted on compromised WordPress sites, with external URIs containing UTM parameters. These findings suggest the document is designed to redirect users to potentially malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4395

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://drafthe.ru/uplcv?utm_term=against+effective+altruism PDF link annotation
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160847dd6cf676---76557362974.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/jobijag.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/pizapiferuxuk.pdfIn PDF document text
    • https://resonanceacteurs.nl/userfiles/file/paziguvedomagisidop.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/0f0ff911acfc185e6b821c4405a73b75/28411378491.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5e44b6ddc---37680473202.pdfIn PDF document text
    • http://nfc.soo.jp/file/xegawoturide.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac963ee852c---88774772432.pdfIn PDF document text
    • http://pc-driver.ru/userfiles/files/ravirexununogoninajigujim.pdfIn PDF document text
    • https://virker-ikke.dk/files/perovaguzazazufoviwuze.pdfIn PDF document text
    • http://atek-ent.com/upload/file/luvogofuluxowosakobiwi.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/28f17320c79008558a756d84910f957b/79879370634.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160a92c206ed8c---dovuwizewawo.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/tugujilazetodemofovex.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/cn71t8sqjhnnq483vjl28ttmmq/33299148963.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706f38d99bf---87560333433.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/sabomakagodekisunurox.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/0aa0458f8ff3f51680156653b11cc2aa/gusifipuferimo.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/98610725219.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16070d4cbad114---xamof.pdfIn PDF document text
    • http://954move.com/clients/4890/File/57166522795.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/10114673315.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/sofizefefiganugeso.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a324d497707---92326710248.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e0bc2735de47beb0be21483ec20a015d/34833312535.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/4af2498a7a83def69720bcf0984f4030/wefeku.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608713f2b858d---14837150859.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001163b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1163B 10704 bytes
SHA-256: 545c8ac4b84ad9459cabcf9f851cc20b95ca6952f79f1d5496f8fa32fb253c75