Malicious PDF — malware analysis report

Static analysis result for SHA-256 64ce13d50e166a62…

MALICIOUS

PDF

75.0 KB Created: 2021-02-16 05:46:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 70ff23fdf9402c0cce9f02c45ea74d07 SHA-1: a3a8c393d004e0e6356cf0c3fd87844a3fa5427e SHA-256: 64ce13d50e166a62633efd5f7441f974f4fd0c063afd887677fef4ba168be5c8
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing or malware distribution campaign. It contains a large number of external links, many pointing to other PDF files, suggesting a link farm designed to obscure the ultimate destination. The primary external URI, 'https://maypoin.ru/strik?utm_term=chicco+liteway+stroller+travel+bag', indicates a potential lure related to product information, which is then used to redirect users to a network of other PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://maypoin.ru/strik?utm_term=chicco+liteway+stroller+travel+bag PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4478927/normal_6018eda357c98.pdfIn PDF document text
    • https://cdn.sqhk.co/fogibadeku/YjcUujc/gosakigamometagusafudav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380531/normal_5ff422076466f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392210/normal_6022e97f02107.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374954/normal_600f384d8805d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482858/normal_5fd7fac69d4d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459482/normal_600d42ef77889.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/WihLCk3/stickman_zombie_shooter_hacked.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480174/normal_601686e2733ff.pdfIn PDF document text
    • https://fosozofafeg.weebly.com/uploads/1/3/1/8/131856121/mujokijerogobok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380084/normal_5fcaf699512f8.pdfIn PDF document text
    • https://cdn.sqhk.co/rinilafexowi/Zhcjbhe/microsoft_teams_for_mac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE774 5360 bytes
SHA-256: 5effad1eae7a6e17fa1713989cc6664a6dab4347470bbac06ebc161fd0cb42ab
font_01_sfnt_off0000f9c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C9 10508 bytes
SHA-256: 3aaf144019854eda251b4ecdc07abc00b47aaf0219eafba9897af9c8c8345202

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