Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f8ab0b8774e38e2…

MALICIOUS

PDF

50.6 KB Created: 2021-03-29 00:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a5b64040a9a650b933c8d0d7966ed84e SHA-1: 0c403f22c77f3c43d1f899dd1800faba3ce5fe2f SHA-256: 6f8ab0b8774e38e23fdc110d46150b351ecd6e32aefc2db48731b1470279784f
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, indicating it functions as a link farm. The presence of 'utm_term' in one of the URLs suggests a potential phishing or SEO manipulation campaign. ClamAV detected this file as 'Pdf.Phishing.Trojan', further supporting its malicious nature. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6306

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=que+es+un+acido+clorhidrico PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373516/normal_601dbf9575acf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493266/normal_5ff7b9d0c93f4.pdfIn PDF document text
    • https://cdn.sqhk.co/dujagazatad/jdgcgct/55928053285.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467005/normal_5fd3c7ce28132.pdfIn PDF document text
    • https://cdn.sqhk.co/sejujona/id8rMji/blank_hockey_jerseys_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445337/normal_5fd65a439081a.pdfIn PDF document text
    • https://cdn.sqhk.co/rovujesox/ZibhcZz/99389909817.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405467/normal_604b85294e203.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465396/normal_5ffc13c8daa36.pdfIn PDF document text
    • https://cdn.sqhk.co/gulizate/eojgpjh/galaxy_star_wars_background.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495395/normal_5fd9f1f97a82e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484118/normal_6041caa30257e.pdfIn PDF document text
    • https://cdn.sqhk.co/dosakupu/hjhjfgh/gmail_login_history.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419423/normal_5fd63820d453e.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/jjBjfhc/62385288659.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384459/normal_5fcc950155fca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491705/normal_601c7bfe90775.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445743/normal_60551fc731cb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501998/normal_601de32c40609.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381321/normal_602a0fed164c4.pdfIn PDF document text
    • https://cdn.sqhk.co/tamupoto/0Q61Xjh/14580613339.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369164/normal_602aa6d710231.pdfIn PDF document text
    • https://cdn.sqhk.co/nedupugifuka/RIajcf4/pottery_barn_faux_fur_christmas_stockings.pdfIn PDF document text
    • https://b993c520-4fc9-488d-8dda-35d8b3dc2713.filesusr.com/ugd/6f5492_9812275980cc4c289a013314ce5ac309.pdf?index=trueIn PDF document text
    • https://7835c217-6b95-46a1-915a-76cdebae3fe0.filesusr.com/ugd/debfb4_b744412b45b04854a5cf2b22fbdee0a2.pdf?index=trueIn PDF document text
    • https://72cdfa97-b5fe-44cc-9aa9-3142b5aa642a.filesusr.com/ugd/ee32c9_d6e56ecbb125424a8d3ff8a7cb99dd82.pdf?index=trueIn PDF document text
    • https://0fc0baf9-b884-4fcd-968e-f93c0f938930.filesusr.com/ugd/68ec51_bc23322e87aa4a4c984f8e2a80c2541b.pdf?index=trueIn PDF document text
    • https://aaf2f8d8-4593-4070-95c3-ed2308805076.filesusr.com/ugd/337eea_2d5d09f4c2944edba582b4baba04a258.pdf?index=trueIn PDF document text

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