Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4130fb4ab6153e6…

MALICIOUS

PDF

66.8 KB Created: 2020-12-23 09:37:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8ded010302ff72a87cd918901663d20 SHA-1: d51608fe5af37120957ac37691a8eef7d016536d SHA-256: e4130fb4ab6153e64c5269b3feaf66e3101380570f3bb70ab58cea3cffb0881c
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains an embedded URI pointing to 'traffking.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/aws?utm_term=alternance+informatique+toulouse
    • https://cdn-cms.f-static.net/uploads/4415046/normal_5fd6657fc2f15.pdf
    • https://cdn-cms.f-static.net/uploads/4366961/normal_5f938e652361c.pdf
    • https://cdn-cms.f-static.net/uploads/4366024/normal_5fd24118b07c0.pdf
    • https://cdn-cms.f-static.net/uploads/4472491/normal_5fc0bf6411acc.pdf
    • https://cdn-cms.f-static.net/uploads/4373992/normal_5fabe14f9f1c4.pdf
    • https://cdn-cms.f-static.net/uploads/4386605/normal_5fbd648683134.pdf
    • https://cdn-cms.f-static.net/uploads/4383916/normal_5f8c388821796.pdf
    • https://cdn-cms.f-static.net/uploads/4387410/normal_5fb29328757fe.pdf
    • https://static.s123-cdn-static.com/uploads/4372074/normal_5fcbe4ebbf1c4.pdf
    • https://cdn-cms.f-static.net/uploads/4384035/normal_5f8e59a9b6044.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/bewibiwat/xixonimanokapar.pdf
    • https://s3.amazonaws.com/susonanezaj/email_format_regex_c.pdf
    • https://uploads.strikinglycdn.com/files/f09ba84a-1ac6-49d4-9235-16770ec9498a/vuwuraxufunozodakit.pdf
    • https://s3.amazonaws.com/dujepav/89861750670.pdf
    • https://uploads.strikinglycdn.com/files/a8c5f2d5-9476-4e2c-a565-34a0933e43ab/11829720084.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_off0000c558.bin
a5ecdac2fddaf8eaf07ef186ce58e0c4d7bb016104a55974d8768db1549f08a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC558 5144 bytes
font_01_sfnt_off0000d6c4.bin
1b954002af678c4bd557744e8a8faf556d47a52714e084389ef81996039f8312		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C4 11996 bytes

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