Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a43badd4a321175…

MALICIOUS

PDF

69.8 KB Created: 2021-01-09 17:39:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 182406b6d9ad68374ff96b4d68638a2c SHA-1: e87683e8ca3e003e7c810131788441474dfc51a9 SHA-256: 1a43badd4a3211750397d227de5142da3548751de20c1fd4a2b1510454a062f3
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/123?utm_term=ff14+macros+crafting'. This indicates the document's primary purpose is to lure the user to this external site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for a phishing or malware distribution attack pattern.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/123?utm_term=ff14+macros+crafting In PDF document text
    • https://cdn.sqhk.co/lusajiki/lDghcgi/download_grow_tower_castle_defender_mod_apk.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/b7452143-3bda-414c-8137-ed694ad78673/sasevikigafofapafiginoga.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/figma_icon_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/2525748059.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/sepesekuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/best_unblocked_games_77.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a435096-1c97-4263-8450-9865f1f5dff5/besiruwerirevele.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/78585328321.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17e68dae-1a02-4c12-988e-c1736340c82b/42714296486.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/68215878445.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/deseja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dec38f45-e69f-4663-8fbd-1e776f2b4ed4/2795938408.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_off0000d152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD152 5264 bytes
SHA-256: 98b30a5c12f7aacd1156e62264e03773c3ddaf96550fb114732fb674c58567db
font_01_sfnt_off0000e32a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE32A 12576 bytes
SHA-256: ea78062987e2609b9ed7f99c968aba51b3549a012ccf82ae4d90d034a469d2bf

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