Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7fbed37ee52e74b…

MALICIOUS

PDF

72.5 KB Created: 2020-12-27 07:37:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: e36dd353dda8bacff97e8e7910ae734a SHA-1: fcba258baaad49c65e1a53c0b23739765ef6dae4 SHA-256: d7fbed37ee52e74bea52e91fa21a786657f90f281d255a6b76d9c49bb1c4df36
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'trafffe.ru', which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to a 'Board bring up guide'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/aws?utm_term=board+bring+up+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386081/normal_5f9ef50ee5bf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489415/normal_5fb61c83e6de6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5f8aa7ebea717.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/5787a89d-49db-4af7-8e37-c2d31f93bc78/63890823491.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/852f7af0-b09c-4d88-a49f-8e1ba309e340/gw2_kessex_hills.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/81054653345.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29f9ac8a-fbf6-4b84-96ae-be5d7551c90f/por_13_razones.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/12023663974.pdfIn PDF document text
    • https://s3.amazonaws.com/mupakijivuruzim/green_day_drummer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e988c416-b205-4cc9-885e-7dcee29979b6/guitar_hero_iii_legends_of_rock_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a7efb2c-bdab-49e4-b696-d19f26bdc22e/libepesib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a58f8bde-fdfc-4496-8f8a-e3a64d1ab63c/8_quart_pot_size.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/39206350060.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_off0000de66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE66 5108 bytes
SHA-256: 5cd0be516b17b44cc1355618e0ded304e13e6db8ec9ac3e1cf31d7f013858caa
font_01_sfnt_off0000efce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCE 10972 bytes
SHA-256: 6bc16a605efb0f1af93bb144d83ab0299b61b2b4e590698fdaeb5b85ab88fd30