Malicious PDF — malware analysis report

Static analysis result for SHA-256 50751762054cc180…

MALICIOUS

PDF

77.8 KB Created: 2020-12-30 09:23:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e743b790f50e50ec26f9c4640427b55 SHA-1: 7f445c9afa7364a1e8471c4e55bf2b2ec8ba6506 SHA-256: 50751762054cc180ee679e7046174f205a90fac1a376578fa666d8c29308f563
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafffi.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, suggests a lure related to a 'crash test dummy game app', aiming to trick users into visiting the malicious URL.

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://trafffi.ru/strik?utm_term=crash+test+dummy+game+app
    • https://cdn.sqhk.co/lapefuxolu/RBlH2jh/ziriguxewelabuter.pdf
    • https://cdn.sqhk.co/zozijawutuxu/ghjjiiz/lifeafter_download_pc.pdf
    • https://cdn-cms.f-static.net/uploads/4366400/normal_5f8714a4f08e1.pdf
    • https://cdn-cms.f-static.net/uploads/4474989/normal_5fb4b898af3dd.pdf
    • https://cdn.sqhk.co/pozuwifofub/Ahfihjg/49021878489.pdf
    • https://static.s123-cdn-static.com/uploads/4497685/normal_5fc7e0a7c6dd6.pdf
    • https://cdn.sqhk.co/peluxisomex/hEhibhi/vital_vital_booster.pdf
    • https://cdn.sqhk.co/pufojoloz/gLhaepl/44184664077.pdf
    • https://cdn.sqhk.co/muzorefu/hBcOUib/car_factory_tycoon_mod_apk.pdf
    • https://cdn-cms.f-static.net/uploads/4495973/normal_5fd1d77bad3bf.pdf
    • https://cdn-cms.f-static.net/uploads/4369506/normal_5f8e18d3c2946.pdf
    • https://cdn-cms.f-static.net/uploads/4406497/normal_5f99cfafd504a.pdf
    • https://cdn.sqhk.co/nevawanipo/UPeggf9/zombie_smasher_mod_apk_home.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tetazino/60918081493.pdf
    • https://s3.amazonaws.com/fejatepudopito/sportsmanship_award_template.pdf
    • https://s3.amazonaws.com/jijumupade/5762824054.pdf
    • https://s3.amazonaws.com/zuxadol/januxatezemuberofukox.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dec9.bin
67decd60a249a6e550b86a19959843d83f5e8b22c7c05c04b56059e4f15556da
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC9 5348 bytes
font_01_sfnt_off0000f0d3.bin
b7eca8dc5e265f80658f6acec476b58a5b5e7bbca7759f8f41d0f3fe3899594c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D3 10456 bytes
font_02_sfnt_off000114cb.bin
36298d9b42482ef505b651e9545134b76438dad7e59d1f17d96a2cc3761d4b83
pdf-font-stream PDF embedded font (sfnt) at offset 0x114CB 16304 bytes