Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ae959597ed638bb…

MALICIOUS

PDF

73.8 KB Created: 2020-12-28 08:54:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45a7e7dcb173759b000cc802531d02f5 SHA-1: cb4305648bba6731f24d3625b905cf4000ccfe1a SHA-256: 4ae959597ed638bb3b58298ad7ab4d48a2b8c3b84f4e8dde0671c8c14f07cbbf
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'traffset.ru', which is likely part of a phishing or redirection scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into visiting a malicious site, possibly for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://traffset.ru/aws?utm_term=alquiler+coche+formentera+tripadvisor
    • https://cdn-cms.f-static.net/uploads/4420260/normal_5fb2b9fb3a569.pdf
    • https://cdn-cms.f-static.net/uploads/4454425/normal_5fbc3e96c1d71.pdf
    • https://cdn.sqhk.co/soxemudu/Ahb98kg/92241464540.pdf
    • https://cdn-cms.f-static.net/uploads/4497666/normal_5fbdcd3e4b255.pdf
    • https://cdn-cms.f-static.net/uploads/4447877/normal_5fa6884ff0399.pdf
    • https://cdn.sqhk.co/wuwovodegi/ujaJwEp/kozimuwolatujetekidukeve.pdf
    • https://cdn-cms.f-static.net/uploads/4454048/normal_5fa97ca8aceec.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vavale/17498537754.pdf
    • https://uploads.strikinglycdn.com/files/3214ecdf-a0a8-4e9f-bf27-602886cb7070/download_battleloot_adventure.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_off0000e0ed.bin
1f5c06d200ca60c3ab4d7b75818ecdb379db6d341d80e4b7e51ba86664f73292		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0ED 5572 bytes
font_01_sfnt_off0000f3bb.bin
dccf7705db7c7eb0b39f87660871087f38da806a071125749cd2af1fd38a0877		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BB 11300 bytes

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