Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d0b6827e79e4c93…

MALICIOUS

PDF

53.0 KB Created: 2021-09-08 21:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 9eea5b42eb2e67e1e5e3e488c8b5bac8 SHA-1: 460de7c2826f9592dac929f9ca74b9ea7e9d9b53 SHA-256: 7d0b6827e79e4c930baa5f5467a25b668d077ab44619a3c5a32a0d0478f92ebb
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which are structured as link farms on disposable hosting, suggesting a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically points to this behavior, and the presence of external URIs further supports this. No scripts were extracted, but the overall structure and URL distribution strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6348

Heuristics 4

  • 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 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://krisoc.ru/uplcv?utm_term=fs+ia6b+receiver+manual PDF link annotation
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/1222157950.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/pixusemaziko.pdfIn PDF document text
    • http://thebankcardservice.com/uploads/files/50504804574.pdfIn PDF document text
    • https://fix2go.info/userfiles/file/6173864476.pdfIn PDF document text
    • https://alstar.uz/images/shared/file/76296470739.pdfIn PDF document text
    • http://geoscan.it/userfiles/files/68371372941.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613112eeaf186---roruz.pdfIn PDF document text
    • http://savitapiti.org/ckfinder/userfiles/files/23294054539.pdfIn PDF document text
    • https://luiginoiobbi.com/userfiles/file/redarew.pdfIn PDF document text
    • http://uitetenindex.nl/images/uploads/pojotudajasasovuxaxojab.pdfIn PDF document text
    • http://desiaussies.com/ckeditor/uploads/files/rawivuxenikiripepupom.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/71059374452.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130663f93eda---kojurigaruroba.pdfIn PDF document text
    • http://emeraldcovepartners.com/_data/images/file/vepigokifubix.pdfIn PDF document text
    • http://whipitleather.com/userfiles/file/78710421097.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sozodabajevitibamuwetok.pdfIn PDF document text
    • http://gonganmi.com/userfiles/file/93706851622.pdfIn PDF document text
    • http://okna-dvere-online.cz/media/upload/upload/file/zifejirofofer.pdfIn PDF document text
    • http://wtmongolia.com/materials/file/lesipotap.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/29443158170.pdfIn PDF document text
    • http://milwaukee.center/userfiles/file/butanepumupizibezokufunu.pdfIn PDF document text
    • http://maiodi.com/userfiles/files/52005260333.pdfIn PDF document text
    • http://hermandadperdon.es/userfiles/file/dibukut.pdfIn PDF document text