Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2de13f60836571d…

MALICIOUS

PDF

67.7 KB Created: 2021-01-13 13:57:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 4751bd5e5875f7d5622a51fd9fa9af6a SHA-1: e47e9b91d9048ac4be237b719043f2489116cba9 SHA-256: b2de13f60836571d09633db43ce503c4fb32b15a38012c9df04209b47a70df7e
154 Risk Score

Malware Insights

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

This PDF file contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, with one pointing to 'https://trafffe.ru/wb?keyword=legend%20of%20solgard%20forum%20deutsch', suggesting a lure to a fake forum. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a dropper or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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/wb?keyword=legend%20of%20solgard%20forum%20deutsch PDF link annotation
    • https://fulipevaxavu.weebly.com/uploads/1/3/2/6/132695351/397400.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485436/normal_5fe7d956b6213.pdfIn PDF document text
    • https://fimetopim.weebly.com/uploads/1/3/4/3/134399480/9a31d8297a8c0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500417/normal_5ffd6a4b42c38.pdfIn PDF document text
    • https://vinovubetiloj.weebly.com/uploads/1/3/4/6/134679092/5544009.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369647/normal_5f920f52da1c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367644/normal_5fec8c0544b02.pdfIn PDF document text
    • https://ziwopigop.weebly.com/uploads/1/3/4/3/134380455/4662a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390068/normal_5ff3cd47244f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403557/normal_5fcd0aa59be2c.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/timeziso/68043461314.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/bdo_farming_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/81201877546.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB80 5376 bytes
SHA-256: 4b92ec02f62cc3e04dc23dc0032ec73ae2af2b4aa68ee92c0953212f4db56bb4

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