Malicious PDF — malware analysis report

Static analysis result for SHA-256 f64e31a82cf325ab…

MALICIOUS

PDF

69.6 KB Created: 2020-12-27 19:29:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc777a8945889290ab46de5a859a6c92 SHA-1: 1b6652b3208e8e4972dc9aacf249e4a0a84323d9 SHA-256: f64e31a82cf325abe8f7e2746c1a4190e88a11055398f6cc3a5a6aa115ddf4db
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical alert for redirecting to known malicious infrastructure. The embedded URLs point to disposable hosting and redirectors, suggesting a phishing or malware distribution scheme. While no scripts were extracted, the PDF structure and URL analysis strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?utm_term=can+you+escape+room+2+level+39
    • https://bilunoxenaxu.weebly.com/uploads/1/3/4/4/134474733/nijana.pdf
    • https://cdn-cms.f-static.net/uploads/4372983/normal_5fa60df5112e8.pdf
    • https://static.s123-cdn-static.com/uploads/4473403/normal_5fcb67797e549.pdf
    • https://cdn.sqhk.co/zenetofuma/S7pdWUL/gugozaki.pdf
    • https://cdn-cms.f-static.net/uploads/4373502/normal_5f8a3e9348618.pdf
    • https://zipuwuxa.weebly.com/uploads/1/3/4/3/134376087/vutef.pdf
    • https://voruvagozi.weebly.com/uploads/1/3/4/7/134742827/butavitamum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3a93be5c-a022-4f2f-9a9b-dfbcb1ac37aa/limifaxesum.pdf
    • https://s3.amazonaws.com/paxunu/spotify_music_location_android.pdf
    • https://uploads.strikinglycdn.com/files/20c25faf-686a-468f-83a4-c9add9f0874f/masanoji.pdf
    • https://s3.amazonaws.com/figugipopar/44698908650.pdf
    • https://uploads.strikinglycdn.com/files/f1f0227f-621d-4f05-9044-239c3c1b0a19/lumizadepok.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d280.bin
6f3e9f3c625b824c9205cbe751b9e890a954316e1a5824a8e4572b301e604bb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD280 5596 bytes
font_01_sfnt_off0000e575.bin
1c70c0f0e057b98850a895a35ba81a8a7e59d17426a08dd3e8aae342c01995c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE575 10468 bytes

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