Malicious PDF — malware analysis report

Static analysis result for SHA-256 0af379bcf4033a4b…

MALICIOUS

PDF

71.3 KB Created: 2021-04-28 05:04:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a154d9cd4c88b1bfed42c06c08d1442c SHA-1: 273511608a21cf78cfe546d0adb3488f1edea885 SHA-256: 0af379bcf4033a4bb9a8b8657384ee6abef3f3c389496155acd6c85267ba37e0
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the heuristics indicate that the document is designed to redirect users to malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/9de6872ee3c0a5daad38374b8da0415d/38556242284.pdf
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/cea75569758a0bdeb42ca437f633d631/vejogazugo.pdf
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/604f8f5ad48c16407d3e74b6dea93437/bagagifudarak.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e4da0342c---jufewukoginuf.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16087188953ab7---83317573907.pdf
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/3e0fee8f9aaed45dd5cd24cf5ea07d45/fonoxudeduwalawel.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/97omdr2j7mhvjvl487539trvj8/53892225172.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f56173e781---78545360526.pdf
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/3b17988684cdd2863ad0646e252e8057/96723413575.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16083203e6856f---98666963631.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/ak9og438pftfiip6prd9kprp2b/nuvewepariwimetitovu.pdf
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c083387e81---66247798622.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160734bde4e9b4---67118611709.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606e2b8076d9c---baxobinatakebofetab.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ab8c8667f---bukojapusevuzug.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=epl+table+bbc+report
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db13.bin
78ca64eb121af8505d8ae1f15d5a8ef0f3cbd409d5757b4394663f57015dc375		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB13 4848 bytes
font_01_sfnt_off0000eb9a.bin
72ec1727ae604f8940e8080baf53244d8f5b66da297410f81310cddbe50fdce0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9A 10920 bytes

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