Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c0bca429547e413…

MALICIOUS

PDF

67.6 KB Created: 2021-03-24 17:24:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 12a50bd07c0f38f7f7b2d2c2d9d41105 SHA-1: 338c0ea374756a810ec55f090e4c3b478517eef7 SHA-256: 6c0bca429547e4139f87fb5c5f0a7b9ecb585253e9565ff42fd0153a2ba107f3
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 0.7249

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://crophysi.ru/strik?utm_term=baby+stories+to+read+to+the+womb PDF link annotation
    • https://cdn.sqhk.co/puxolika/Nm6Hggc/dudomejiwi.pdfIn PDF document text
    • https://cdn.sqhk.co/viwedanej/ieigW6A/mojasiluju.pdfIn PDF document text
    • https://cdn.sqhk.co/jilebodetifa/ifDghjc/navy_rope_rolling_technique.pdfIn PDF document text
    • https://cdn.sqhk.co/nogawevorus/kkbhfgj/fisam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383302/normal_600f93a831645.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502268/normal_601723d78d3f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481985/normal_601335e28edeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_60395cf44d668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03a51b86-b17a-4594-bc3c-adcaadc31c74/58600786747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2591272e-b089-4885-849d-80a24887f873/holmes_ultrasonic_humidifier_cleaning_instructions.pdfIn PDF document text
    • https://1a6c606f-1efd-495f-9370-57f425d809fd.filesusr.com/ugd/1be480_17ac8e95dcd94664b2af354b161b55fb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffa6aa42-86c5-4720-b964-c6a83b91b599/touch_of_class_promo_code_january_2021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/308a75e3-95f4-4833-ba46-e500a56749b1/6210384417.pdfIn PDF document text
    • https://44034db3-6cdd-4729-adf3-7ccd6afcf354.filesusr.com/ugd/9fe9cc_0d0909cac7c94d1ca350bee5c2fc5e68.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/332f542b-fdb7-4777-a326-59ce7818d2d8/3020845940.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd388d9e-520e-4922-ad85-2f37dfd42a7e/7509528885.pdfIn PDF document text
    • http://vizulubafaxal.epizy.com/chirunavvutho_telugu_full_movie_free.pdfIn PDF document text
    • http://norisufa.epizy.com/eso_blacksmithing_leveling_guide_2018.pdfIn PDF document text
    • https://ed36ca5d-e6e9-4caf-8bbb-3a8af5cfee16.filesusr.com/ugd/971556_0b056dd4d394470ba3219f3bc3dd33ba.pdf?index=trueIn PDF document text
    • https://2b08c346-38d8-4763-b559-bb9d4fff2313.filesusr.com/ugd/40c9d6_23535cf085ed40a09c8a40893187dee3.pdf?index=trueIn PDF document text
    • https://8650d040-a33d-467d-a608-6706f181f11b.filesusr.com/ugd/61b8bf_13d9bfab44f64238af5074bf60ae4aad.pdf?index=trueIn PDF document text