Malicious PDF — malware analysis report

Static analysis result for SHA-256 2216fbd6710c7858…

MALICIOUS

PDF

97.1 KB Created: 2021-03-12 12:16:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 96291973292336c839a640235a090b08 SHA-1: d4da41b3e35c4fd7a821362a543e137637af152a SHA-256: 2216fbd6710c78584cd21780a014c4e2bd81bab6109000f114180dda6a66988a
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution via these links. No scripts were extracted, and the document body is heavily obfuscated, preventing a more detailed analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6007

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/award?keyword=catalogo+ngk+mexico+pdf PDF link annotation
    • http://nutapobo.iblogger.org/82449976643.pdfIn PDF document text
    • http://shishkin-seed.xyz/bovafelotufozat1f6dl.pdfIn PDF document text
    • http://shoppermarket.online/231904378685royn.pdfIn PDF document text
    • https://814cba0f-f649-4223-bfe6-7884e6e02b9d.filesusr.com/ugd/c1108c_ac4ab0ea095a4b28b547c21685a7962f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/polexebuj/21240466041.pdfIn PDF document text
    • https://5663e088-3595-439c-971a-5873693bee35.filesusr.com/ugd/e98895_4e930c2436524fd895cbb5885c59aa9e.pdf?index=trueIn PDF document text
    • https://0df22b04-17ae-4e65-9af8-3af4445b4601.filesusr.com/ugd/71fd01_be2662394e5e4b0b95bc6e6a93683394.pdf?index=trueIn PDF document text
    • https://835a0401-7144-467e-aacc-710587930ffc.filesusr.com/ugd/432cba_09fc4636474d4e5f945f3982ddcdf62d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zesotat/character_traits_worksheet_for_4th_grade.pdfIn PDF document text
    • https://810dce77-56ab-4324-823a-3549757f4eab.filesusr.com/ugd/1fad07_57b939c7782d40de8bc168c2cdf09f0e.pdf?index=trueIn PDF document text
    • http://bofutezexo.rf.gd/40273356889.pdfIn PDF document text
    • http://rovuwuruw.epizy.com/social_media_definition.pdfIn PDF document text
    • http://jokipuzovorije.epizy.com/non_disclosure_agreement_template_uk.pdfIn PDF document text
    • https://5d3a357a-25b2-4459-9cd8-210b235f7b36.filesusr.com/ugd/45e30f_c8df0c41eea944c188e54424b41b97bd.pdf?index=trueIn PDF document text
    • http://lutewefopuv.rf.gd/gunirekutonemasevede.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/buzuvosumufusufipegesuz.pdfIn PDF document text
    • https://0e098354-e5d1-4afc-9be7-763a70ae5e44.filesusr.com/ugd/ef253e_848dc6abebe94bcd96a2534b987991d9.pdf?index=trueIn PDF document text