Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6b4614ff7bd9689…

MALICIOUS

PDF

60.7 KB Created: 2020-11-13 20:12:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92d1e45d4135f91086dac0bf899f78fc SHA-1: d4806d58c88bf452a6c645cf9768b2eda2622b39 SHA-256: f6b4614ff7bd9689e8f950d1df213af84dd8c9856ef71c80971ba6caf8b53569
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, with a specific ClamAV signature indicating it is a phishing trojan. The PDF contains an embedded URI pointing to 'traffine.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 exploit users via a malicious link, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://traffine.ru/123?utm_term=brandes+investment+partners+salary
    • https://cdn-cms.f-static.net/uploads/4393349/normal_5f90a37a3fbe6.pdf
    • https://cdn-cms.f-static.net/uploads/4417806/normal_5f9560b801f47.pdf
    • https://cdn-cms.f-static.net/uploads/4449783/normal_5fa09d2bbe039.pdf
    • https://cdn-cms.f-static.net/uploads/4450889/normal_5faaab99be303.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a32bf300-3bb7-4e64-bd09-22a5c98c6cd0/32266819382.pdf
    • https://uploads.strikinglycdn.com/files/95532f55-9d87-4133-9b82-8f84e46165e6/funny_porn_scenes.pdf
    • https://s3.amazonaws.com/tudawufed/xegupasolubumawewe.pdf
    • https://uploads.strikinglycdn.com/files/0cdc1cbe-b216-42c6-98e6-07559da65c51/kefaret_trke_dublaj.pdf
    • https://uploads.strikinglycdn.com/files/80fa8192-a8c7-4611-8d3e-8ecce6703a9b/magabibakebunukamagerotu.pdf
    • https://s3.amazonaws.com/purixifusipelid/24365240344.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_off0000b188.bin
b2dd93b05a78c4c612b33a42a7c18212df658f4be73775051958b9fb271b4cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB188 5316 bytes
font_01_sfnt_off0000c392.bin
57484451cab531918a91a5ad943c58887ea0d238af28003df61f6b8752e411e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC392 10332 bytes

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