Malicious PDF — malware analysis report

Static analysis result for SHA-256 26b6be18d5ba2624…

MALICIOUS

PDF

83.2 KB Created: 2021-06-06 22:12:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a5ca595d59e4bc0abd34a1e3fe53683d SHA-1: 0804293c2086fb5f246c6054c5ab0639a5d21caf SHA-256: 26b6be18d5ba262449dd7904b3511d32eb4274773226c8f8ecc702c3eb09532c
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 0.9484

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://archism.ru/pbw?utm_term=junkspace+rem+koolhaas+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374189/normal_601197b13fd9f.pdfIn PDF document text
    • https://batozovij.weebly.com/uploads/1/3/1/4/131455337/rawipogulap.pdfIn PDF document text
    • https://vimosetadasosus.weebly.com/uploads/1/3/2/7/132740377/778277.pdfIn PDF document text
    • https://filuloxi.weebly.com/uploads/1/3/2/7/132740414/nazitefem.pdfIn PDF document text
    • https://jotinebemoti.weebly.com/uploads/1/3/4/6/134681432/2090930.pdfIn PDF document text
    • https://totuseki.weebly.com/uploads/1/3/5/3/135322554/9103345.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379385/normal_6021a27a7e8f1.pdfIn PDF document text
    • https://vosegatibi.weebly.com/uploads/1/3/4/6/134697540/fukat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478927/normal_603a449e43469.pdfIn PDF document text
    • https://bigasena.weebly.com/uploads/1/3/4/7/134725946/nevemotukaz.pdfIn PDF document text
    • http://fesatisobif.pbworks.com/w/file/fetch/144724242/powarupoxabilekexetij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21e232d1-f7b0-4fe3-bf67-457f98bd87fd/how_to_connect_two_dishwashers_to_one_garbage_disposal.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/w/file/fetch/144652491/what_are_the_pros_and_cons_of_the_fourth_industrial_revolution.pdfIn PDF document text
    • http://daridameku.pbworks.com/f/52220192858.pdfIn PDF document text
    • http://poforezufovu.pbworks.com/w/file/fetch/144681441/96409930102.pdfIn PDF document text
    • http://tozuxexap.pbworks.com/w/file/fetch/144657510/how_do_i_change_zoom_background_on_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e485019-b829-48d4-bd7d-cd54bda1ec80/fexapololitovov.pdfIn PDF document text
    • http://ropotupi.pbworks.com/w/file/fetch/144720012/words_to_describe_a_womans_body.pdfIn PDF document text