Malicious PDF — malware analysis report

Static analysis result for SHA-256 754bc5364a96db63…

MALICIOUS

PDF

59.6 KB Created: 2021-09-09 08:09:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: db0d76a8c2cf27243d63bc764f781d86 SHA-1: d1185f3decf8bc9960e76c206e5f1ada89f1796b SHA-256: 754bc5364a96db6357539213d0c43f7b1585540e18e73c061a29cb770f4581eb
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. The presence of multiple unknown-reputation URLs further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5424

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 https://coretry.ru/uplcv?utm_term=instagram+auto+followers+for+free PDF link annotation
    • https://cfi-registration.org/buzzboxgift/img/userfiles/files/dazisejezigiset.pdfIn PDF document text
    • https://myphambambi.com/webroot/img/files/wapomuvesebuputokeravuze.pdfIn PDF document text
    • http://librojuridico.com/aym_images/files/dawodogujafokodopafusinij.pdfIn PDF document text
    • http://varosom.hu/userfiles/files/wuwaxazobekusavopuz.pdfIn PDF document text
    • https://smartstone.ca/userfiles/files/sabep.pdfIn PDF document text
    • http://danangsculpture.com/uploads/image/files/selonukutepitibenozi.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/21005472614.pdfIn PDF document text
    • http://essiac.cz/UserFiles/file/23463465852.pdfIn PDF document text
    • https://partroyfuneralhome.com/partroy/assets/file/87779908165.pdfIn PDF document text
    • http://mabifitness.it/userfiles/files/jukeguwovod.pdfIn PDF document text
    • https://la-klamm.org/userfiles/file/gajamixivovomatititi.pdfIn PDF document text
    • http://mp2020.csysadmin.com/ckfinder/userfiles/files/lagolobevumoferif.pdfIn PDF document text
    • http://www.centrosanmarco.eu/img/news/files/59649474555.pdfIn PDF document text
    • https://alansglobalservices.com/ckfinder/userfiles/files/ziparorenitideweverob.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/vujawamug.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/71493811486.pdfIn PDF document text
    • https://renewone.de/files/vunomipirarexivizasotole.pdfIn PDF document text
    • http://ingegneriarossi.it/userfiles/files/xixufadut.pdfIn PDF document text
    • https://candbco.com/ckfinder/userfiles/files/burokurepapuzo.pdfIn PDF document text
    • http://bamor.org/userfiles/file/faxazawepitozajafodor.pdfIn PDF document text
    • https://brune-schmuckwerk.de/ckfinder/userfiles/files/zosedaweg.pdfIn PDF document text
    • http://tiga.co.th/ckfinder/userfiles/files/60424073635.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16130ff00e87af---9587763796.pdfIn PDF document text