Malicious PDF — malware analysis report

Static analysis result for SHA-256 3651942e9a41160e…

MALICIOUS

PDF

74.6 KB Created: 2021-04-05 09:35:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f67fca9ce057a4a71aee72c468c93452 SHA-1: ad11ca3877c3a576a83e5efc9ce5dfaee4bc81f9 SHA-256: 3651942e9a41160e35e6ba7b3f4832fae3125e93b9a35243b5a63e49fca1ee9b
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to distribute malicious content. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification also flagged it as malicious. The embedded URLs suggest a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6585

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://nipisod.ru/aws?utm_term=ar-15+assembly+lube PDF link annotation
    • https://kodabovoxalomas.weebly.com/uploads/1/3/5/3/135340354/kexopisar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484835/normal_603727b6b618f.pdfIn PDF document text
    • http://italia-doc.fun/xazedabunenivufojijajole10vow.pdfIn PDF document text
    • http://pycnidwzxc.info/13239941927ymbdk.pdfIn PDF document text
    • http://ladukusuga.22web.org/devexpress_aspxgridview_edit_form_template_validation.pdfIn PDF document text
    • https://pixadodo.weebly.com/uploads/1/3/2/7/132740612/juxise-jazaruf-davovovow-kevogej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496193/normal_606544efb8f42.pdfIn PDF document text
    • http://trackengine.host/suntrust_fraud_prevention_numberrj22f.pdfIn PDF document text
    • https://remenogabeta.weebly.com/uploads/1/3/4/0/134012297/fevilaki.pdfIn PDF document text
    • https://nobopejulalajib.weebly.com/uploads/1/3/4/6/134621416/nutoliwelidewu.pdfIn PDF document text
    • https://cd70d4e5-4a1a-4071-96d1-f2415ea5ece1.filesusr.com/ugd/7f46b5_348fc79f44404bc384776ac1df660492.pdf?index=trueIn PDF document text
    • https://20e8ec16-a7ca-487e-906f-4b2d5c2744e2.filesusr.com/ugd/ab81b8_22ddcdbebed146f987bf33b85cd13456.pdf?index=trueIn PDF document text
    • https://55afd15b-9a96-48ff-beb6-d705f4765584.filesusr.com/ugd/8b06a9_b1af6557feaf4c3e972b428ca3505522.pdf?index=trueIn PDF document text
    • http://kajifota.epizy.com/suzoribixuguxatuzavibub.pdfIn PDF document text
    • https://247e77cc-5367-4382-8586-7c5891409f42.filesusr.com/ugd/2dbf5a_d02934a5807a4723a687fe21fcaa623d.pdf?index=trueIn PDF document text
    • http://selafaveso.rf.gd/1994003862.pdfIn PDF document text
    • https://0e75ab8e-f6a1-4360-bef2-1d94e06fde4e.filesusr.com/ugd/c0518c_fb076ce2b07d4f7293fc660a1e643209.pdf?index=trueIn PDF document text
    • https://ffcd7f67-9b43-45c2-8e44-b15cca9583b8.filesusr.com/ugd/48bf55_360bddbe1587430a83f7c7063c6a3d1a.pdf?index=trueIn PDF document text
    • https://160e4e15-e27a-4ef2-9b26-f67fc0969a86.filesusr.com/ugd/cbdbb6_1ea29835b13949aa8889cb8d808d34b1.pdf?index=trueIn PDF document text

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