Malicious PDF — malware analysis report

Static analysis result for SHA-256 290502628d31a40c…

MALICIOUS

PDF

70.4 KB Created: 2021-01-21 03:08:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02e990c3d6538bd010e746a46b1c3062 SHA-1: 7b26518975ed96fe409c2ade18d451b467daa23a SHA-256: 290502628d31a40cf2452ac563ed24c38c9bcde18ff0dcd1d20002b9e2f9391f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL `https://traffmen.ru/123?utm_term=mens+pinstripe+suit+black` is flagged as malicious. The ML classifier and ClamAV also strongly indicate maliciousness. The document body, though heavily obfuscated, appears to contain text related to a 'Mens pinstripe suit black', suggesting a lure for a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/123?utm_term=mens+pinstripe+suit+black
    • https://cdn.sqhk.co/norifasil/gjYzaha/62231804721.pdf
    • https://cdn.sqhk.co/nusuguponu/fgeAzsK/94452176307.pdf
    • https://cdn.sqhk.co/danopefasuf/H4jahfx/roblox_gift_card_codes_2020_unused.pdf
    • https://site-1177607.mozfiles.com/files/1177607/today_s_weather_forecast_for_chicago.pdf
    • http://kokilubowo.22web.org/rokediterifaliji.pdf
    • https://site-1241989.mozfiles.com/files/1241989/pusaraduwojamubamu.pdf
    • http://bezigex.iblogger.org/jkbose_datesheet_bi_annual_2019.pdf
    • https://cdn.sqhk.co/gisusisabez/jgr6jfv/zombie_hq_game_download_for_android.pdf
    • https://site-1175722.mozfiles.com/files/1175722/isa_datasheet_for_ultrasonic_flow_meter.pdf
    • http://xurufotuzu.iblogger.org/werudadamalajuneruwezok.pdf
    • https://cdn.sqhk.co/fekigimuzib/eysop0c/54675444572.pdf
    • https://cdn.sqhk.co/vodadavubex/ahgCJih/18089634393.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://demuremapinob.epizy.com/ragiji.pdf
    • http://vutevesofu.rf.gd/dojusamiwud.pdf
    • https://s3.amazonaws.com/zoromexemuzid/arjun_reddy_movie_sad_bgm_free.pdf
    • https://s3.amazonaws.com/visagogijulep/work_in_progress_report_construction.pdf
    • https://s3.amazonaws.com/pexodugosa/naming_amides_worksheet_with_answers.pdf
    • https://s3.amazonaws.com/medaliwifufugel/answer_key_nts_2019.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_off0000d72a.bin
72ce13d04db00c8f9e56d964907ca9bf9b782b8beb741dfd20012316ac6f12ce
pdf-font-stream PDF embedded font (sfnt) at offset 0xD72A 5136 bytes
font_01_sfnt_off0000e8bc.bin
d49b21d56281170191f66e17654e4ff14692998183dd92a56dd86725f0278f4c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BC 10584 bytes