Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f145f16707afe04…

MALICIOUS

PDF

62.5 KB Created: 2021-05-31 22:03:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 69fdd9e88e506928a328fea317cddc7e SHA-1: 3c10ee8860783ed1d48ecf15f91029fff1fbd178 SHA-256: 0f145f16707afe04b287971980c6d9d19c3e3b92ae765456c5a662c60fb1c521
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 0.7657

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://inwebjor.ru/pbw?utm_term=the+lean+fast+diet+pdf PDF link annotation
    • https://kopiwuzurori.weebly.com/uploads/1/3/1/3/131398237/nekorison.pdfIn PDF document text
    • https://tubolapibakosi.weebly.com/uploads/1/3/4/8/134872187/4492252.pdfIn PDF document text
    • https://konilusikiwi.weebly.com/uploads/1/3/3/9/133986353/6699416.pdfIn PDF document text
    • https://zedaluridafam.weebly.com/uploads/1/3/4/4/134464222/7454425.pdfIn PDF document text
    • https://xetamoro.weebly.com/uploads/1/3/2/8/132815737/1be0eb76f2c595.pdfIn PDF document text
    • https://juvidefe.weebly.com/uploads/1/3/4/3/134319267/rapufiwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500438/normal_605814443e1f1.pdfIn PDF document text
    • http://mumubib.pbworks.com/w/file/fetch/144413310/vepebekudejepebatotesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d34ec13-6283-45f7-972b-74045adcfec1/pekiweluwovujisirol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c82be45f-364c-4849-96b4-24d35782d20f/nusidazewasagelazexutu.pdfIn PDF document text
    • http://lakebimutep.pbworks.com/w/file/fetch/144415959/download_after_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4431994c-b68e-445c-a8cf-7f165b0a9226/anlage_vm_jobcenter.pdfIn PDF document text
    • http://povelin.pbworks.com/w/file/fetch/144420264/43299810178.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33cdf8f9-26b3-48fa-8072-16e448c8d118/66620188541.pdfIn PDF document text
    • http://visetululiv.pbworks.com/f/how_do_i_find_world_war_1_service_records.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f482d7cc-d7ac-4143-bef7-f057c272b17f/56873069794.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2739b454-8219-4e50-8c40-543e62935f21/65685611280.pdfIn PDF document text