Malicious PDF — malware analysis report

Static analysis result for SHA-256 9253ae44ab8e8b9e…

MALICIOUS

PDF

38.7 KB Created: 2021-06-26 13:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f26ae311da85f83af3cfa27c701932a1 SHA-1: 20840bde29b3b5a8fb8dfce966e1d6dcd0af1001 SHA-256: 9253ae44ab8e8b9e60bd40de02948648b14682c9391c65994a62710cccfb2af2
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by multiple heuristics and ClamAV, indicating a phishing or malware distribution attempt. The PDF_IMAGE_LURE heuristic suggests it presents an image to trick users into interacting with embedded links, which are numerous and point to compromised CMS uploads and disposable hosting. The ML_NYX_PDF_MALICIOUS score further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8501

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 38 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://synerhu.ru/uplcv?utm_term=features+of+realism+in+literature PDF link annotation
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/864pj8dobv5k42csd5hd36o000/242720061.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c1b3ab4d3---62548340871.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c240c2b7641---14339437659.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/8213ae02dbaeb45ee584bf916de1c986/voditojuzirogekegij.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780fb402f2e---65050765488.pdfIn PDF document text
    • https://energooptima.hu/upload/File/pojovez.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c3faece506d---83556731741.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/e701928872b35ffb0240348e68e90c18/jitazituwi.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/62798561252.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/mit10rlnflbai4in6jm6o2jl46/kekusiwategoraxewo.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/telukenuwadimusajare.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c011f1ebba8---74425194967.pdfIn PDF document text
    • http://almar-bus.pl/userfiles/file/bepitawogokofejanugebesim.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/conteIn PDF document text

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