Malicious PDF — malware analysis report

Static analysis result for SHA-256 f86a0f00f4227564…

MALICIOUS

PDF

74.4 KB Created: 2020-12-19 18:15:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 41f1ca67d514f68e683910b369b36930 SHA-1: d3fe964ebf0bf1ac805c0f4101ffba1c4e635c80 SHA-256: f86a0f00f422756416cde2224f6a473b6625d3960cf140c221394c592f31eb69
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'traffine.ru', which is a strong indicator of a phishing attempt. The document body, though heavily obfuscated, contains strings related to Delsea High School athletics, suggesting a targeted lure.

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://traffine.ru/123?utm_term=delsea+high+school+athletics
    • https://cdn-cms.f-static.net/uploads/4368747/normal_5fb4ab7394541.pdf
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5fb8c25acbf80.pdf
    • https://static.s123-cdn-static.com/uploads/4389106/normal_5fc977c1a4257.pdf
    • https://cdn-cms.f-static.net/uploads/4370533/normal_5f9c6e824ae0f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/leteraxewe/5998264187.pdf
    • https://static1.squarespace.com/static/5fc10b16085bf90c0efde155/t/5fd14ba2a3ae4c72e4ba3dda/1607551909839/94829628354.pdf
    • https://static1.squarespace.com/static/5fc292fabda9c57a97c8d54c/t/5fcbfec65d2e6f3bda27b0a9/1607204551866/invasion_usa_filming_locations.pdf
    • https://s3.amazonaws.com/vufuzewasi/60871086649.pdf
    • https://s3.amazonaws.com/towutoginadivu/jubaxokajesagaforur.pdf
    • https://static1.squarespace.com/static/5fc5d411085bf90c0e1ee6b1/t/5fcaaad7f7d8747e17d9a954/1607117529248/my_city_island_mod_apk.pdf
    • https://s3.amazonaws.com/gupojakami/zezetezebosididixapukaji.pdf
    • https://s3.amazonaws.com/pidufozu/sarkari_exam_up_police_answer_key_2019.pdf
    • https://s3.amazonaws.com/rokuwapesu/salwar_kameez_neck_designs_catalogue.pdf
    • https://s3.amazonaws.com/fenatagazise/brondell_swash_1400_manual.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_off0000e671.bin
fb0d8ee6c447ea2912b6db77b0e61cae70511079dfd98cc6618ce2c631f7077f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE671 4964 bytes
font_01_sfnt_off0000f75e.bin
f3ef01b6726ef534d7c31ee38e23d5e6b4c90a7b302a4b753f359739c346031d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF75E 10872 bytes

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