Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c5073c0b34034a7…

MALICIOUS

PDF

84.0 KB Created: 2021-01-06 19:33:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5885173aef84b5ea76aa476a7d6670a4 SHA-1: d100359bab9cc10463bb46fe579c22abc8c81f7f SHA-256: 6c5073c0b34034a777526bbf6c4de1b4be7b94442e84928a90559fc27d9ce147
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, with a high risk score. It contains an embedded URI pointing to a suspicious domain, trafffi.ru, which is likely part of a phishing or malware distribution campaign. The document body, though partially corrupted, suggests a lure related to chess strategy, aiming to trick users into clicking the malicious link.

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://trafffi.ru/aws?utm_term=defensa+siciliana+najdorf+pdf PDF link annotation
    • https://cdn.sqhk.co/paxepilekot/je5AmbS/rinudonotupopedokesimebed.pdfIn PDF document text
    • https://xenapake.weebly.com/uploads/1/3/4/3/134353424/vedoz_wiwinaxemitokeb_kunakoxovab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371272/normal_5fcccea808891.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411489/normal_5f9db3bdd4c06.pdfIn PDF document text
    • https://cdn.sqhk.co/mokavokaven/5dmhfhd/fruit_fancy_game_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465000/normal_5fba4e5c05723.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/dugibabafod/ccs_university_exam_form_for_bba.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/raduwadoriv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cee3bda-c2a8-4fc1-9468-ff18bad2a878/hi_cooking_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/chibi_papercraft_template_maker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e883bd3-17c4-4768-b0fe-83501011752d/mana_san_antonio_tx.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_off00010b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6F 5224 bytes
SHA-256: 0e2c1b05f57776ffe31f13ac4f5aff8b6095e2c31e8f86b555e9cd663c1359de
font_01_sfnt_off00011d50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D50 11296 bytes
SHA-256: 1e4f4038a722090eaa12ef86690ae8968cbc2dddf33ee2eda1f14a5d2bf664db