Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7d3b82ec8ae4e23…

MALICIOUS

PDF

103.1 KB Created: 2021-03-22 00:44:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3321e61e92f51ace400413a0f3965e09 SHA-1: ea81f561387d79d57fb4abf46501d1e0b4964858 SHA-256: b7d3b82ec8ae4e234ce758bbbca4ecb77f360585a99f5a944f2a0f58773e0be4
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to direct users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs, such as 'https://maypoin.ru/strik?utm_term=what+can+kill+nail+fungus', are indicative of a lure to a phishing or malware site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8733

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://maypoin.ru/strik?utm_term=what+can+kill+nail+fungus PDF link annotation
    • http://boxijogirexu.medianewsonline.com/xonifawizumodulave.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465149/normal_5feb5e9e7bad9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444638/normal_6003df55ed837.pdfIn PDF document text
    • https://limorevoxa.weebly.com/uploads/1/3/4/6/134611026/5094233.pdfIn PDF document text
    • http://vixegoxufareka.getenjoyment.net/6404816057.pdfIn PDF document text
    • https://febewizonobuwom.weebly.com/uploads/1/3/4/3/134311996/9747978.pdfIn PDF document text
    • http://xavelodezazil.iblogger.org/30631030997.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416302/normal_5fc9c1173f630.pdfIn PDF document text
    • https://fuvejewitopi.weebly.com/uploads/1/3/1/0/131070508/394819.pdfIn PDF document text
    • https://ff102949-4c65-4b7b-925c-ea9a98d885fa.filesusr.com/ugd/7a16bb_14532a3e5fb74c428f8bbff661a4abb2.pdf?index=trueIn PDF document text
    • https://dab7fb03-f2af-4a8e-9cb9-31de623bedb3.filesusr.com/ugd/58b596_35d670a119784138bb2f29b7510c3629.pdf?index=trueIn PDF document text
    • https://9ef77391-fdd1-48d8-ba15-364b07375333.filesusr.com/ugd/ebefdf_0b015b9e9ee145baa92c897ced0427bd.pdf?index=trueIn PDF document text
    • https://3e1ae61b-6b68-46dc-8a90-d1c7a5b9f91c.filesusr.com/ugd/b8bbd7_a2f56911eef94e3aa369872ebbb2692b.pdf?index=trueIn PDF document text
    • http://tufukeg.epizy.com/xudowefopine.pdfIn PDF document text
    • https://bee08bb6-d8c1-4cc5-89f0-d6ac88a4f64a.filesusr.com/ugd/8b8a1f_7674824136b6495eb91f0c678f99e8d6.pdf?index=trueIn PDF document text
    • http://jopiwutipav.epizy.com/double_acting_pneumatic_cylinder_datasheet.pdfIn PDF document text
    • https://c3438639-6a75-4920-aa4f-d1e0b619354f.filesusr.com/ugd/3be3a7_afdbd3d2652c41a097555132509cb732.pdf?index=trueIn PDF document text
    • http://vulomalizekuvu.rf.gd/meningitis_por_candida_albicans.pdfIn PDF document text
    • https://5cbbff6b-7c47-4fbb-abda-9de5069fbc88.filesusr.com/ugd/1a89c8_b202a36d4a224c969adb5c7ffc3e4f9d.pdf?index=trueIn PDF document text
    • https://246406bc-bb0d-4f29-baed-d8a6153a9543.filesusr.com/ugd/3ddeef_f27b9dfda89742dba3991188a6740cfc.pdf?index=trueIn PDF document text

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