Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5bf2cd73003f639…

MALICIOUS

PDF

90.7 KB Created: 2020-12-27 02:50:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2583e5f1f74fc1520403cf4a8324d7cb SHA-1: 2c8ba350815694a1de3140003a9b81e84876ed9a SHA-256: f5bf2cd73003f639da7745646f695dedb1447f6549a5c9466b8f41b9eba66394
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'trafffe.ru', which is likely part of a phishing or malware distribution scheme. The document body, though partially corrupted, suggests a lure related to a 'Kamakura day trip guide'. No scripts were extracted, but the presence of external URIs and the overall malicious classification strongly indicate a phishing or credential harvesting attempt.

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://trafffe.ru/aws?utm_term=kamakura+day+trip+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4468537/normal_5fcfe47d906e8.pdfIn PDF document text
    • https://cdn.sqhk.co/pofevadamem/ijjfhgG/badland_winch_review_9000.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426080/normal_5fb0115f72bd9.pdfIn PDF document text
    • https://cdn.sqhk.co/wuseguwe/gciegjo/vejepogafejasakukekenog.pdfIn PDF document text
    • https://cdn.sqhk.co/retuwami/bijigii/gikumowokepuwejiba.pdfIn PDF document text
    • https://cdn.sqhk.co/sabeludejem/sIjdvU1/ocotillo_wells_map.pdfIn PDF document text
    • https://cdn.sqhk.co/vopufepivipe/gigh9hh/11454002032.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/YggiMHw/bread_runner_meaning.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367920/normal_5f8d30c248573.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzezajolu/GyhcLhi/87558799361.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477156/normal_5fd9cb451240b.pdfIn PDF document text
    • https://cdn.sqhk.co/rosafipex/jMGjg0J/bingo_blitz_facebook_problems.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/53ee61a0-c067-4be1-9e6b-ee151b4f881c/wish_promo_codes_feburary_2020.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001276b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1276B 5204 bytes
SHA-256: a53d96e0bf2e69416089dcd2fef98fd19ced110e07aff1979217758dec843c0d
font_01_sfnt_off00013917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13917 11008 bytes
SHA-256: 250935c0b92172d08c9a89fae788db46c41bcb4bbe5afa1fbd59c8f47fa92f50