Malicious PDF — malware analysis report

Static analysis result for SHA-256 d01d325f60f03ef4…

MALICIOUS

PDF

66.2 KB Created: 2020-11-25 06:48:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 617f2b617332e359f2d94daf0142d7f5 SHA-1: b3f9e212d4a1c54d09fb1a825a37340571d234a2 SHA-256: d01d325f60f03ef4eb840f66870209bc0fe0486c58f0648fab094d382a76b311
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirectors or link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the PDF structure itself is designed to lead users to external, potentially harmful, sites.

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
  • 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.
  • 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.
  • 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=e+squared+pdf In PDF document text
    • https://jekowidemovo.weebly.com/uploads/1/3/4/7/134702183/zoresoge.pdfIn PDF document text
    • https://batujesidow.weebly.com/uploads/1/3/4/6/134666028/150741670.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428035/normal_5fa08b7717182.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456122/normal_5fa4458f4b224.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373304/normal_5fb27a700175a.pdfIn PDF document text
    • https://xafuraworeduvux.weebly.com/uploads/1/3/4/7/134752052/difemojuza_zezuxiwijasej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389090/normal_5f94f40c435d0.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/juxatop/parukusotu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/575ac746-7c8f-48db-ae7d-74b59969bdd8/98056147468.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/98973476782.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0211732f-3d75-447c-9bde-967453680077/neruvimaxugera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d0c1c17-454d-4b51-97f3-95666f3d1fc7/santa_cruz_uke_club.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a1789f9-4d43-4d06-89dc-99bbd661040b/44760334193.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_off0000c866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC866 5084 bytes
SHA-256: 5a3ec5e0ceeeff949e5a5d6091504e757d97c921810253083fee02431540ea42
font_01_sfnt_off0000d9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C0 10140 bytes
SHA-256: a6edd6c2df5a6e8a519b4f2cae69ed5043c2710d32d2634356fe68b51bff80ab

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