Malicious PDF — malware analysis report

Static analysis result for SHA-256 668e664bec51de42…

MALICIOUS

PDF

87.3 KB Created: 2021-05-19 08:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 102738209acdb67d8d486015b064b8c8 SHA-1: 70d367b479fb9c44e4ef97508ff0525d670be0ba SHA-256: 668e664bec51de42659b543dd2f1199f5d78c5647dc2801f3f873f21880643af
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations, suggesting a phishing or malware distribution scheme. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' further supports this assessment. The document body, though heavily obfuscated, appears to be a lure related to media downloads, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6907

Heuristics 5

  • 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
  • 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=uyire+serial+colours+tamil+title+song+download
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/v52m4j28uqhgfmj4a41v81v961/pidovagetorowojufani.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160719755ab7f6---dadexanaja.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a20c8576abd---womarisenemi.pdf
    • http://kfbi.ru/content/file/10522094206.pdf
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/jo8h0shmd7li9f1u6nnkohvopq/guropelomefino.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/15371bcecc917b570db62279f57255fb/76128258345.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16073ae169ddc7---26350884382.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3b9c37807---tojatomilirexuladep.pdf
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/nqno6fkp9ea1dsmka5vjedvp2v/80055044450.pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160903b2b22110---wuvuguvamugajugisi.pdf
    • http://kath-kiga-bw.de/bilder/berichte/file/20754613816.pdf
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160987950983ca---benirikogitu.pdf
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/8rni083ecq07tkqkmg37p15tf3/bawow.pdf
    • https://alternativecarrepair.com/userfiles/file/35467030328.pdf
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/fe1b0bf6cbc3aa8b0e7687ac204975c5/6002653664.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/bf9a74800c7048d2f15f257297c77230/90612209508.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013c2a.bin
e86fc5e8ea5b3e00eb30cccd4ac8577415e44a072758c5312237fdd2300b8c7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C2A 5444 bytes
font_01_sfnt_off00014ea9.bin
e25ed182d4b5f7a6dc9e359df8582a6aa9d57e148b772b18b4b79d83e37b88ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14EA9 3200 bytes

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