Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ef4972440f53ce…

MALICIOUS

PDF

74.4 KB Created: 2021-01-05 11:44:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c06b30cbfd277990c79e956437fe045 SHA-1: 2088bf586f1ed4481467f3b606a0706ae3151fea SHA-256: 49ef4972440f53ced8aae0bbed87abe39720305641a7ff2ce219b894a59e54dd
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a critical heuristic firing for ClamAV detection. An external URI pointing to 'traffset.ru' was extracted, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF format and the presence of embedded URLs indicate a potential for client-side exploitation, likely through embedded JavaScript, to redirect the user to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/123?utm_term=all+my+sons+play+characters
    • https://static.s123-cdn-static.com/uploads/4486778/normal_5fce13d6d802d.pdf
    • https://static.s123-cdn-static.com/uploads/4505687/normal_5fc89bfa6c89f.pdf
    • https://cdn-cms.f-static.net/uploads/4485443/normal_5fd640c442f7a.pdf
    • https://static.s123-cdn-static.com/uploads/4465719/normal_5fccfb8da2633.pdf
    • https://cdn.sqhk.co/kezavilageg/dq0jecW/69139584817.pdf
    • https://cdn.sqhk.co/nomavunut/Aghajib/zombie_tsunami_redeem_codes_2019.pdf
    • https://cdn.sqhk.co/bezizafosu/rgjr6tQ/kegavod.pdf
    • https://cdn.sqhk.co/feduvefas/X1BjhwT/sovuxidokozajatonupiwa.pdf
    • https://cdn-cms.f-static.net/uploads/4380699/normal_5f8b2938cfda6.pdf
    • https://static.s123-cdn-static.com/uploads/4484169/normal_5fedd19f399ec.pdf
    • https://cdn-cms.f-static.net/uploads/4417808/normal_5fd943d2b428e.pdf
    • https://cdn-cms.f-static.net/uploads/4475389/normal_5fd15cb8a5f26.pdf
    • https://static.s123-cdn-static.com/uploads/4458833/normal_5fe5ac221778f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/niporofez/ancient_of_days_ron_kenoly.pdf
    • https://s3.amazonaws.com/pexodugosa/baraka_da_prince_donda_ndugu_audio.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_off0000e507.bin
256e39694f64ecc1380f9b0d8d9a5d274b9d09465673c892d98b2ead597195a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE507 5264 bytes
font_01_sfnt_off0000f6c8.bin
e61dae5d4ec82baca47b7e35e0213c99b04d803e9307587fc028b57f2bd96520		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C8 11140 bytes

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