Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c10cffebea2c414…

MALICIOUS

PDF

56.6 KB Created: 2021-06-09 15:49:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42db9acc96b2d0676936a6f21ff2c396 SHA-1: 2f346c53ddbf1150a1825b4bf39c89865e3d280b SHA-256: 6c10cffebea2c414784c3f6c0cd1a08e932aee6e4436a3e18d496b2addd22be8
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable hosting. These links likely serve as lures to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8118

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://cructi.ru/uplcv?utm_term=bioshock+infinite+will+the+circle+be+unbroken+lyrics
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/573548f2c9f81e02569a3fb3de83f4a4/lisobiterozakovewapen.pdf
    • https://easybuildapp.com/files/uploaded/files/46520819959.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c056ebe8aed---80207175853.pdf
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/14rv03mk2egeosb83fs5jo7ir5/70402448140.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/uctft490soc9frnk1hof1rkc23/86780346167.pdf
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5822d97550---gilatubavizele.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a094d11ef---kimamiparumutevamawewa.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160776662f05bc---39815365464.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff1e2b8935---57572455451.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160764b260cd0d---dojuxoxokegexeruxigegu.pdf
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/8rvqgbk71df0skitp0sg68uevf/96808351938.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16099d8dcb0cc5---nobawejamareb.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/a9a9vntu1o52j0rhao9sqq0q0t/xikenugolelurewili.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/j5ov44o35vl3vjkto87o0286h6/genijigifowuwodoxomur.pdf
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/9j02jgchietc03eut8au2g8vkb/kiwezamoboxutexavarefi.pdf
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a7aa7d92ec4---ximinexexamera.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d44d.bin
75f0a5e244e539f3de0027c197113049633e1d5769a5e6a8802cf818035b0df5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD44D 5208 bytes

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