Malicious PDF — malware analysis report

Static analysis result for SHA-256 901e2b7ef2bdeeb8…

MALICIOUS

PDF

65.4 KB Created: 2021-03-09 10:10:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ff8d7b43c367506216e8aba38a366d75 SHA-1: f1dd5c69b1c3b32f1221577f70a39305fcfd4144 SHA-256: 901e2b7ef2bdeeb8890b5fff32ecfcac65d9996897616069ee44a3ab44f37783
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7571

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://kuzutuzo.ru/award?keyword=2+digit+addition+with+regrouping+worksheets+2nd+grade+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416654/normal_603d0488383d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413473/normal_6020bf16e267e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381344/normal_60312a410fc17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385631/normal_60273e87634cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422877/normal_603e29ed5d07e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484375/normal_5fce2a0ee2f46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470545/normal_602437c0ca3b9.pdfIn PDF document text
    • https://tezefidusipenu.weebly.com/uploads/1/3/1/8/131857758/siwotofiloxed_nusinematorote_vufubeje.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412165/normal_5ff7adba0a544.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457305/normal_60356e1d9058b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403121/normal_6046ec9126d9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415326/normal_601e4820a407b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501501/normal_5fd960282adae.pdfIn PDF document text
    • https://rogapunuki.weebly.com/uploads/1/3/4/3/134375427/12057.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468831/normal_60060fdfe1f8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492875/normal_60234ec77c498.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465400/normal_600f2218b72ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468530/normal_5fd0f2ccdb75b.pdfIn PDF document text

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