Malicious PDF — malware analysis report

Static analysis result for SHA-256 2de60b9d584f1e8d…

MALICIOUS

PDF

67.3 KB Created: 2020-12-24 11:58:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f0b7170490fd6e63c376dc7f5835e4e9 SHA-1: 5c285252de29fe4c25b35989141c03a32eb02010 SHA-256: 2de60b9d584f1e8df4cc2c468cc71bbffb368c9734ca6e4b59750a3d852853da
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. The presence of numerous external links, including one pointing to 'trafffe.ru', suggests a phishing or link-farming attempt. The heuristic 'PDF_SEO_LINK_FARM' indicates the document is designed to host a large number of external links, likely for SEO manipulation or to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=recharge+pcs+250+euros+en+ligne PDF link annotation
    • https://cdn.sqhk.co/navififoro/gfX9ege/sniper_killer_assassin_shooter_pc_game_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458145/normal_5fd2a433543b4.pdfIn PDF document text
    • https://cdn.sqhk.co/tadawatimi/cig8kgd/nsw_train_timetable_sydney_to_wollongong.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447626/normal_5fba3557670aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411922/normal_5fa1dc2d758c4.pdfIn PDF document text
    • https://serawododi.weebly.com/uploads/1/3/4/8/134885696/f68cdcb2.pdfIn PDF document text
    • https://cdn.sqhk.co/dutebosatu/CGjhhaT/tebexoxumabebalikatib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476936/normal_5fb00ded007aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420752/normal_5fad7556d904b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479718/normal_5fa77fe44d391.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392857/normal_5fb5859e92ac8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387412/normal_5fcdd4a6e891c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445879/normal_5fc40886d2c5e.pdfIn PDF document text
    • https://cdn.sqhk.co/vemonososepa/RF28WZJ/gamefly_download_ps4.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/3025c4d1-5599-490a-9c73-715e4c734840/manorolodikekibofigori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f2427c0-7190-4af0-96da-4db2e3b0c161/33166406232.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_off0000c9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9BF 5600 bytes
SHA-256: 25b86a0a7abb45199f222874aba4d700c7712f32f89c58aa7018c36cbe953860
font_01_sfnt_off0000dccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCD 10560 bytes
SHA-256: 913aee7e6e5ca56987f16eeb46992575e66d125347a7a31bc7dc0a3a31bbdc77

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