Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade6314e6668e2f3…

MALICIOUS

PDF

127.7 KB Created: 2021-04-19 05:36:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 2e5ea52ab60513d7168ecea57772f62b SHA-1: 7f86b1f5c36757a3ef162c4fabb462db423855e0 SHA-256: ade6314e6668e2f30a48fca62a0e5aae9b8ceef1afad76ab8f1d363b55bf4d9c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document detected as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to domains that appear to be used for hosting malicious files, disguised as resumes or other documents. The presence of these links suggests an attempt to redirect the user to a malicious site for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9248

Heuristics 4

  • 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 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 http://pilgrimland.com/sites/default/files/webform/resume-uploads/tixatikuwasa.pdf In PDF document text
    • https://www.a1touchsolution.nl/sites/default/files/73086307569.pdfIn PDF document text
    • http://www.friendlycc.com/sites/default/files/webform/85881129832.pdfIn PDF document text
    • https://www.newburghgroup.com/sites/default/files/webform/resumes/tikijoti.pdfIn PDF document text
    • https://ambrose.edu/sites/default/files/webform/kepasibadugemefobovabo.pdfIn PDF document text
    • https://www.jsif.org/sites/default/files/webform/moridiwivomepagaduso.pdfIn PDF document text
    • https://www.telluridescience.org/sites/default/files/tstc-applications/90077644064.pdfIn PDF document text
    • http://cicatsalud.com/html/sites/default/files/webform/jedirokadezat.pdfIn PDF document text
    • https://www.enwidth.com/sites/default/files/webform/resumes/90018929780.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=what+are+the+main+doctrines+of+christianityPDF link annotation
    • https://www.healthdata.org/sites/default/files/resumes/mevupuxapiledowitire.pdfIn PDF document text
    • https://ec.europa.eu/eip/agriculture/sites/default/files/webform/56905881998.pdfIn PDF document text
    • https://ubmemeaensoprod.s3.amazonaws.com/ifsec_international/call_for_papers/2021/03/33404153997.pdfIn PDF document text

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