Malicious PDF — malware analysis report

Static analysis result for SHA-256 83a636f8f48b4301…

MALICIOUS

PDF

70.7 KB Created: 2020-11-18 11:25:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f70ac0afd0af8ec89cba3d0c33f8c16 SHA-1: 1f7247a8a23cc033bd67972512b25b1829b82162 SHA-256: 83a636f8f48b430136114ae0efd2ea4038cb99d1cd287c19f2cd4bc148b851cb
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, trafftec.ru, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, likely for credential harvesting or further malware delivery.

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://trafftec.ru/123?utm_term=the+golden+tower+pdf
    • https://cdn-cms.f-static.net/uploads/4371786/normal_5f90c721caef3.pdf
    • https://sezitekiporav.weebly.com/uploads/1/3/4/6/134627959/4bb7149fda867.pdf
    • https://diwodineguxep.weebly.com/uploads/1/3/4/3/134305573/3938836.pdf
    • https://cdn-cms.f-static.net/uploads/4377371/normal_5fa7aeabeaaca.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5c6fa244-bb09-4cd5-911c-aac926f96da1/86041176238.pdf
    • https://uploads.strikinglycdn.com/files/1975bcf2-fd49-4427-8a5c-ed955b886edd/fativolotivujefuwo.pdf
    • https://s3.amazonaws.com/tuzakifezara/7th_grade_math_brain_teasers_worksheets.pdf
    • https://s3.amazonaws.com/gafedupeba/76779151584.pdf
    • https://uploads.strikinglycdn.com/files/674ab2a2-aa5b-4a9e-8bcd-006973001452/human_covenant_war.pdf
    • https://uploads.strikinglycdn.com/files/3181c1cd-84be-44b4-97c0-b2592e38e4f7/ghost_rider_2_full_movie_online.pdf
    • https://uploads.strikinglycdn.com/files/6df347e1-38ac-422e-9183-625c3bff4320/liquid_uu_matter_recipes.pdf
    • https://s3.amazonaws.com/dumupa/wurifulin.pdf
    • https://s3.amazonaws.com/fujadabez/town_hall_9_base_2019.pdf
    • https://uploads.strikinglycdn.com/files/8b6b95ee-410b-4d32-8dd2-8acb259299c8/computer_aided_engineering_book.pdf
    • https://uploads.strikinglycdn.com/files/64230e4b-6471-4f71-84a4-3404270f533a/acrostico_con_el_nombre_de_lizbeth.pdf
    • https://s3.amazonaws.com/kewuxejikiwe/vewijizonujoweguratomit.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_off0000d5c8.bin
938f4c90d1fc2a7e18cab0bbdce7a30586c83c1c135f8cbe0c4da77ef7cb8360
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C8 4956 bytes
font_01_sfnt_off0000e6b5.bin
8e061650ec0bf1e3cb436c3ce4115afcb8bb0ae9d67f861e19588fd4140af691
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B5 11116 bytes