Malicious PDF — malware analysis report

Static analysis result for SHA-256 375aa6490c13df51…

MALICIOUS

PDF

66.6 KB Created: 2020-12-18 16:45:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3b4180c0b4522be64db6ff5a391c96d SHA-1: b8a8b50e419b1a473e4432ea27d4dd59209bd40e SHA-256: 375aa6490c13df5116ce44f2860e2621a2462d6a1a344f8954dc8febe7c0e1d2
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'traffine.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to a cleaning service, aligning with common phishing tactics.

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/strik?utm_term=bunn+my+cafe+cleaning
    • https://static.s123-cdn-static.com/uploads/4390095/normal_5fc5218842bd6.pdf
    • https://cdn-cms.f-static.net/uploads/4424689/normal_5f99b7e6a6001.pdf
    • https://cdn-cms.f-static.net/uploads/4372087/normal_5f9e1b11736d4.pdf
    • https://cdn-cms.f-static.net/uploads/4413850/normal_5f97fc5920847.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0ba968bfc5186169e54f/1606224809429/pavuvelividibulag.pdf
    • https://static1.squarespace.com/static/5fc5307916f6d44b07da8be2/t/5fd023bf3364176a12515ea4/1607476159493/legendary_escape_rooms_chicago.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0c6a72f8b574a0f573c5/1606225002660/tofef.pdf
    • https://s3.amazonaws.com/zidenigad/gizakojugamasefekusufo.pdf
    • https://static1.squarespace.com/static/5fc5247688c99b6d37c2d33d/t/5fd075b88f1ddd5ccbdd8f8a/1607497144835/brick_look_garden_border_with_solar_lights.pdf
    • https://static1.squarespace.com/static/5fc1858bf7cf8c75402f5531/t/5fcba878393ce47356380ed9/1607182457695/vast_tv_guide_spearfish_sd.pdf
    • https://static1.squarespace.com/static/5fc385e368612547ed6e891e/t/5fcaf2b71ef6d1662fe56850/1607135929308/32485562668.pdf
    • https://static1.squarespace.com/static/5fc2d6f9ff13940aa24c3a4c/t/5fc44c139b1ed0353865fa48/1606700052357/31990352405.pdf
    • https://s3.amazonaws.com/xupimaral/derosivofabudijiredobi.pdf
    • https://s3.amazonaws.com/dusubonifu/90045262632.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_off0000ca5e.bin
c8f7ba68fefcd7ded1f2b3e1a9e15f9c9c7a57a5da10e389b53cb7068c0b4d4e
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA5E 5076 bytes
font_01_sfnt_off0000dbaa.bin
2e7e76f18357eca1851b9b7387a4b13b5fccb5e86b268089adb9d99d768bb12a
pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAA 10056 bytes