Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5b81f6d7833a666…

MALICIOUS

PDF

65.1 KB Created: 2021-06-10 08:35:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f159b9bcc65c9cbe8acb7187236b1bf3 SHA-1: d44fcaa119677660bb0a7114dd668055b2dc93f5 SHA-256: d5b81f6d7833a666c714cd0da536bfe9138a7dbc9f468663d4d52e42093fab4d
184 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.7471

Heuristics 5

  • 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.
  • 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://oniceh.ru/pbw?utm_term=safe+agilist+questions+and+answers PDF link annotation
    • https://wubobuxidozexe.weebly.com/uploads/1/3/4/3/134322977/kinofunotapu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428061/normal_6023f47a4c5d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446019/normal_605a14154dc5d.pdfIn PDF document text
    • https://bifagawu.weebly.com/uploads/1/3/7/5/137512270/9259586.pdfIn PDF document text
    • https://kozegefiseram.weebly.com/uploads/1/3/1/3/131379202/kigunizosakitixal.pdfIn PDF document text
    • https://gunimumatepatu.weebly.com/uploads/1/3/5/3/135313318/vixizafixowevux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417652/normal_5fd76ba69fedd.pdfIn PDF document text
    • https://xubawiki.weebly.com/uploads/1/3/1/1/131163512/mavonukurefatitoxex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417138/normal_6036a06f16d89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412999/normal_606629026deb5.pdfIn PDF document text
    • https://ruzejeparofilag.weebly.com/uploads/1/3/4/5/134582671/3821907.pdfIn PDF document text
    • https://pamokevavazodo.weebly.com/uploads/1/3/4/3/134386981/2654b6990866023.pdfIn PDF document text
    • https://mufisifarugevap.weebly.com/uploads/1/3/4/5/134595961/2ff3199568523.pdfIn PDF document text
    • https://rijujofa.weebly.com/uploads/1/3/4/3/134323569/melebaforigobujejo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490724/normal_6043bcb1d242a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498330/normal_6060372ee47e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448331/normal_603d3b80a4337.pdfIn PDF document text
    • https://bugituwixumanuz.weebly.com/uploads/1/3/4/7/134722584/velefu_kimabijuvijovo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500882/normal_60bcc2e84b0af.pdfIn PDF document text

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