Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0400bcccad39005…

MALICIOUS

PDF

52.4 KB Created: 2021-05-20 19:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2b41e94e3d975ef263524731edbbf228 SHA-1: e4be423252e0de4a91c56e50fa6e03e64890aacd SHA-256: c0400bcccad3900522747b770b755e33441ad7518343146467d5195226862608
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.7360

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/strik?utm_term=how+do+you+announce+a+promotion+in+an+email PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426279/normal_5feb716b87d75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497110/normal_606a369221939.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388422/normal_5ff276b252672.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390999/normal_5fdda9ee0bc94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420014/normal_5fc6fad4b1d36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383912/normal_606dfd03924e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482020/normal_5fd2636fc8f82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467278/normal_606234654178c.pdfIn PDF document text
    • https://binazinir.weebly.com/uploads/1/3/4/1/134108718/lofogi.pdfIn PDF document text
    • https://pomujitumigo.weebly.com/uploads/1/3/1/8/131857402/9669886.pdfIn PDF document text
    • https://nunesevafarub.weebly.com/uploads/1/3/0/8/130874378/wusopezefa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483842/normal_602be9822deb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501656/normal_6055bec49e134.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462339/normal_5ff6667529e95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388611/normal_60109c654bbc7.pdfIn PDF document text
    • https://suxewanevot.weebly.com/uploads/1/3/4/5/134595646/3f020.pdfIn PDF document text
    • https://suwanofanezelon.weebly.com/uploads/1/3/1/6/131636577/tosalamiwe.pdfIn PDF document text
    • https://rozutawupev.weebly.com/uploads/1/3/2/6/132695629/buxasekenip.pdfIn PDF document text