Malicious PDF — malware analysis report

Static analysis result for SHA-256 6726330c043c525b…

MALICIOUS

PDF

63.2 KB Created: 2021-05-27 23:25:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f11cf9b5963501ef110af1fd64b0aa55 SHA-1: 84269a4003c0a0af1e83e6187982cdebed38636f SHA-256: 6726330c043c525b529841c31c419218542b915d9e6ab1d32447ae054fa14ff6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF that contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. ClamAV detected it as Pdf.Phishing.Trojan, and an ML classifier also flagged it as malicious. The embedded URLs suggest a phishing or malicious content distribution scheme, likely involving the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6806

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://nipisod.ru/wb?keyword=heathers%20musical%20full%20script%20pdf
    • https://xuzomavarek.weebly.com/uploads/1/3/1/3/131383242/vifezikaguw-worowagugug-butapa-rojiligosakew.pdf
    • https://devigumekumowir.weebly.com/uploads/1/3/4/3/134394761/29b65e9b31d.pdf
    • https://vevinobe.weebly.com/uploads/1/3/4/4/134487659/5022002.pdf
    • https://cdn-cms.f-static.net/uploads/4476015/normal_605ef09982628.pdf
    • https://romenazojojeles.weebly.com/uploads/1/3/0/7/130775884/2474905.pdf
    • https://jilazokezabise.weebly.com/uploads/1/3/5/2/135296918/jidajaxojisuw.pdf
    • https://cdn-cms.f-static.net/uploads/4368975/normal_6018a1d7dd078.pdf
    • https://gapixupat.weebly.com/uploads/1/3/1/6/131637313/58080299bc2.pdf
    • https://static.s123-cdn-static.com/uploads/4423133/normal_5ff29cf8b7cf0.pdf
    • https://cdn-cms.f-static.net/uploads/4416125/normal_604d28e30f658.pdf
    • https://cdn-cms.f-static.net/uploads/4404987/normal_60475a959e691.pdf
    • https://cdn-cms.f-static.net/uploads/4475376/normal_601deac9dd246.pdf
    • https://kuwesitupimanu.weebly.com/uploads/1/3/4/0/134095951/gigososo.pdf
    • https://kowalarezanir.weebly.com/uploads/1/3/1/4/131438161/10d405.pdf
    • https://doziverilobeku.weebly.com/uploads/1/3/2/6/132695566/3846684.pdf
    • https://cdn-cms.f-static.net/uploads/4366057/normal_6035e0b80a99b.pdf
    • https://static.s123-cdn-static-d.com/uploads/4410965/normal_60afe8d4eb3b1.pdf
    • https://sapefita.weebly.com/uploads/1/3/0/7/130776655/3b7001148.pdf
    • https://jipafopabos.weebly.com/uploads/1/3/3/9/133986828/fozazifonaxe.pdf
    • https://uploads.strikinglycdn.com/files/37c48d6a-dadf-4169-8ee5-01cb63e8661c/32284789203.pdf
    • https://uploads.strikinglycdn.com/files/a55357c9-8b93-48ee-992b-bb22863b62ee/35242154631.pdf

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