Malicious PDF — malware analysis report

Static analysis result for SHA-256 7546b6bda300b242…

MALICIOUS

PDF

76.8 KB Created: 2021-03-10 16:53:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 852800782273a0b0702c58e943ce4f7c SHA-1: ec2240467f04b665baae9984b04f565a879c8896 SHA-256: 7546b6bda300b242c8e45f9a1af682979da2a3ea27af15b115b61ac1559066e1
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, suggests a lure related to psychological schools, likely intended to trick users into visiting the malicious URL for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://soxebez.ru/aws?utm_term=cuadro+comparativo+entre+las+escuelas+psicologicas
    • https://cdn-cms.f-static.net/uploads/4445550/normal_6043ba59ed5e8.pdf
    • https://static.s123-cdn-static.com/uploads/4495034/normal_60003b8b3b019.pdf
    • http://imedo.ru/80214828492628k1.pdf
    • https://static.s123-cdn-static.com/uploads/4494868/normal_5ff0727fb5d78.pdf
    • http://wwnews.site/84307839286e3ere.pdf
    • https://cdn-cms.f-static.net/uploads/4460457/normal_6038ce730a58e.pdf
    • http://1xbet-football.fun/how_much_is_a_new_ipad_mini_294zvu.pdf
    • http://raffle.website/yucaipa_lake_fishing_reportu48cj.pdf
    • http://women-ita.space/wedding_planner_startup_costsk5e8d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1a5f95e3-4a80-4769-86b5-97cdbe23020b/scenery_config_editor_fsx_steam.pdf
    • https://uploads.strikinglycdn.com/files/1d6b4932-6046-4e8b-a788-68bca3b5b2dd/3222249359.pdf
    • https://s3.amazonaws.com/risalenefazozo/fepepuzi.pdf
    • https://uploads.strikinglycdn.com/files/caa8c822-f575-4541-bdf0-c1af2df7f377/patuvegesurewepojasavad.pdf
    • https://s3.amazonaws.com/mefadedosuw/dura_ace_di2_9150_manual.pdf
    • https://s3.amazonaws.com/nagudo/82229268170.pdf
    • https://s3.amazonaws.com/woberiz/pepuwojibokawijimugorexoj.pdf
    • https://s3.amazonaws.com/lewuli/ajanta_caves_images.pdf
    • https://s3.amazonaws.com/xixonu/juxigamegoneboropifipo.pdf
    • https://s3.amazonaws.com/sojaxub/household_chores_app_android.pdf
    • https://s3.amazonaws.com/sowewazulejewi/lanuxibufopojakunekitevin.pdf
    • https://s3.amazonaws.com/fisulefajow/97494728945.pdf
    • https://uploads.strikinglycdn.com/files/9c4739d9-2526-4176-b2fd-726f8e0750c7/pit_bike_track_melbourne.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_off0000eb63.bin
b035d3685ea1463bd725a596a3314dd21c7fec60329f4b6059e2b41725824871
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB63 5356 bytes
font_01_sfnt_off0000fd88.bin
fdd6dfe159572ca84d3d5651da6b21f0186fe5eba1963cf0bb663de69d6104f0
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD88 11772 bytes