Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d6d7560b343feac…

MALICIOUS

PDF

67.5 KB Created: 2020-12-02 09:02:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: fc2f059f1c8cd7dee62bba3a93605ee8 SHA-1: c9756da0ca3bceb22d687e6df1ccb14c66086332 SHA-256: 4d6d7560b343feac7b1b60b04e2a0df67b109e4ae2e5b288a5381dc2b0506556
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, trafffi.ru, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text that suggests a lure related to a 'Fenchurch hitchhikers guide'. No scripts were extracted, but the PDF structure and heuristics indicate malicious intent, likely to redirect the user to the external URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=fenchurch+hitchhikers+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423431/normal_5fb42c5a572e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402722/normal_5f9593bc43833.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/41a68c2c-fa63-43cd-b0ea-00650ee417cf/39935593235.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/wanafetibule.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c3d560f2895dc1e72903/t/5fc1efa861e25426e17d9977/1606545320950/kumon_level_l_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ec10be4-fbe0-4277-96c2-77326c17b68d/persona_5_hierophant_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc123632e537a05ef0a8a98/t/5fc588b9eaf37e3b645a05ae/1606781113714/nupitazeratovit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b518d94f-58d2-4a12-b8cf-d5b78f329bd1/laura_pausini_its_not_goodbye_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d8c645a-4f70-40ac-aa28-da4311baf071/sudewabivapu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50243888-8793-4fe1-8b44-d41854a4d943/magna_carta_student_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5798bb8-4b7d-4c98-b2f0-9bf6afc9efdf/55967269431.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/38163543422.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5f5ef79-576a-46b1-80e3-5c3ccf10cfcf/piduxoluzivonuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/174c1378-8ce6-470e-aa51-9cc51e6b2a11/apk_and_obb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27da6519-fbbb-4ae1-aea1-fe6155048124/power_kanye_west_lyrics_meaning.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_off0000cd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD8E 4976 bytes
SHA-256: 4c8b7dcfe962f6be83c11752e2e0f304c163cdfb0256c72edc6ee879e3453f08
font_01_sfnt_off0000de78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE78 10212 bytes
SHA-256: 3f440ac51cef11e34b13c434b29f0243af3982ce7e5d9da2f5c2e217f403a41d

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