Malicious PDF — malware analysis report

Static analysis result for SHA-256 b42fccad5bcaa3e0…

MALICIOUS

PDF

78.2 KB Created: 2020-12-25 23:10:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 9a247279de6feba2825f70371351e527 SHA-1: ceb414dad4e7fdd497a607389031647fc406ed39 SHA-256: b42fccad5bcaa3e0afadae9c59ed86f2e66219331483615243092c7660e0afa1
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 URL pointing to 'trafffi.ru', which is likely used to redirect the user to a phishing or malware-hosting site. The document body, though heavily obfuscated, contains text related to 'mountain bike helmets', suggesting a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=mountain+bike+helmets+full+face+review PDF link annotation
    • https://cdn.sqhk.co/xakatikakizi/0jf01id/snapped_killer_couples_season_6_episode_3.pdfIn PDF document text
    • https://cdn.sqhk.co/mozopojugode/ghhaied/drone_remote_control_distance.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369153/normal_5fafe1023c145.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452398/normal_5fc0053933ba0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gupuso/63159176003.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e90a507-00c0-40bd-8ec3-82bd51f99587/problemas_de_optimizacion_resueltos_selectividad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5c3bee4-07f0-463c-af28-001a101c7240/mastercam_2018_drafting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2eb2889-9c1b-411c-8085-0cfc717b08b5/gakonarilusigimanel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2519552-a4d7-48cd-8eb6-61a0d5f2fd52/engineering_vibration_inman_4th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d5c5713-815c-4ff2-b345-e76f7fed0627/1916212526.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3440d2aa-4086-4394-a3b6-3b4783fe5c39/76130859925.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d945e48e-1abb-485f-b087-8843a019db5d/minecraft_0.17.0_apk.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF468 5484 bytes
SHA-256: e9dabc2cd7266e301985702075fa10c979beb01fd10fa9fc8cd38f3457ed1fbc
font_01_sfnt_off00010704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10704 10804 bytes
SHA-256: 6ed0584b79905d771eb2904347e9d7cc3a59c8eff084cc515a908185686fd99b