Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ef93fe86968158…

MALICIOUS

PDF

59.7 KB Created: 2020-12-22 03:18:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 46427a23a2efe2acd55560f152b3d28c SHA-1: f298fbd76a29c9fed720f20d4c3caa7be691edf7 SHA-256: d7ef93fe869681588d86654c94b422fc6bc01457e2d91b0bfa4025d41c89425e
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to PDF files hosted on services like Weebly and S3, suggesting a link farm or SEO manipulation tactic. The document body, though truncated, contains a title related to guessing a 'tiktoker by emoji', which likely serves as a lure to encourage clicks on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9873

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffine.ru/strik?utm_term=guess+the+tiktoker+by+emoji
    • https://debawusajatowi.weebly.com/uploads/1/3/4/7/134707072/kutolofo_jusedawisip.pdf
    • https://cdn-cms.f-static.net/uploads/4413566/normal_5f99e74e08716.pdf
    • https://cdn-cms.f-static.net/uploads/4386076/normal_5f9c791d62075.pdf
    • https://zebatezovas.weebly.com/uploads/1/3/4/6/134618099/85700ac9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/470200dd-1987-41cd-ba97-ee7bdbe6909a/xiluridimorebejuvojuwaj.pdf
    • https://s3.amazonaws.com/leributafa/gebegelukafonofenanilabe.pdf
    • https://s3.amazonaws.com/jepinebawo/zugarogipuxakozov.pdf
    • https://uploads.strikinglycdn.com/files/90ee0820-e428-4eaf-ac5b-6e31ea1e50a6/6414249460.pdf
    • https://uploads.strikinglycdn.com/files/c4093a61-370c-4b77-ac65-7fae28bcb887/50688516389.pdf
    • https://uploads.strikinglycdn.com/files/b3e38b04-d986-4867-ac38-6b813b87a68c/3158386649.pdf
    • https://uploads.strikinglycdn.com/files/ba56e3ee-41cc-451c-bb72-93b546f5d6d7/wakumanifite.pdf
    • https://uploads.strikinglycdn.com/files/a80f7527-913f-426e-8379-5f787817b782/dubomikeneraxutorubuzaf.pdf
    • https://uploads.strikinglycdn.com/files/acd9751b-f81a-4a02-9a27-50188fd7231d/63087026558.pdf
    • https://uploads.strikinglycdn.com/files/b3e96924-7de0-40e0-902f-d8b5947190c8/76509689728.pdf
    • https://uploads.strikinglycdn.com/files/5df66f1b-8b17-4c00-a8eb-b618c465d51c/48011673357.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d387.bin
3130f54a183c9e13f30030c26098a6ae8495705423f8d19add0e570c5ebe2cbe
pdf-font-stream PDF embedded font (sfnt) at offset 0xD387 5096 bytes