Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3e4eb798c99f8b7…

MALICIOUS

PDF

82.2 KB Created: 2020-11-19 03:40:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1e50ba3a532a0deebf2080cd1246ed16 SHA-1: 1cb1e5e472447979936c3d6f056a478672530db0 SHA-256: f3e4eb798c99f8b79d0984f4828d044a0fe3e5280b3a4d2c8f69ff65d8c8c93e
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a phishing domain, and ML classifiers and ClamAV detections confirm its malicious nature. The document body, though heavily obfuscated, likely contains content intended to deceive the user into visiting the malicious URL, consistent with a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/strik?utm_term=bdo+afk+fishing
    • https://cdn-cms.f-static.net/uploads/4454435/normal_5fb369cd73e13.pdf
    • https://favasebuwakule.weebly.com/uploads/1/3/4/3/134328846/nowodope.pdf
    • https://varivupe.weebly.com/uploads/1/3/4/4/134480773/fogerekuk-gosuwon-kufewuxirip.pdf
    • https://cdn-cms.f-static.net/uploads/4376404/normal_5fad419277ae9.pdf
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/lazuwemaxode.pdf
    • https://kibutabez.weebly.com/uploads/1/3/4/4/134438896/xidil.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/31955380-4bc2-4506-a15e-c28d4599a729/gefas.pdf
    • https://s3.amazonaws.com/tinezedu/funny_wedding_vows_template.pdf
    • https://uploads.strikinglycdn.com/files/2a9fd66f-4dc2-4fa1-8a3c-87f354beccba/leniliwopa.pdf
    • https://s3.amazonaws.com/vavapekadoliti/animal_drawing_anatomy_and_action_for_artists.pdf
    • https://uploads.strikinglycdn.com/files/ea67abee-e573-4792-bde1-bd0f53d8853e/65453447601.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010302.bin
3c946155c439054a941838e9be29a1515279982d13016728b011138df8ddca01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10302 5152 bytes
font_01_sfnt_off0001149c.bin
5ffe7e3dbcf964b1b6204f893df5b9fb5216f6cf0bbf5c6ad564e800a72ce2d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1149C 11820 bytes

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