Malicious PDF — malware analysis report

Static analysis result for SHA-256 164de49d2ef8ac23…

MALICIOUS

PDF

41.2 KB Created: 2021-09-10 17:59:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a21e451f8769f369162faa27dedb9958 SHA-1: c5b487e223eadc05604dbb63a66f33385e1a4f08 SHA-256: 164de49d2ef8ac238eac55294b080e48682a81d4f07e71f1ec5c820d43aad919
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as malicious by multiple heuristics and ClamAV, specifically flagging it as a phishing trojan. The 'PDF_IMAGE_LURE' heuristic indicates it's an image-based document designed to trick users into clicking a link, which is a common phishing tactic. The presence of numerous external URIs, many pointing to disposable domains, further supports this. Although no scripts were explicitly extracted, the PDF structure and heuristics suggest it likely contains embedded JavaScript or exploits to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8482

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
  • 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 41 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://dep14kirov.ru/userfiles/file/72775707812.pdf In PDF document text
    • http://skupka54.ru/upload/m/bexexexodomekavadafizodum.pdfIn PDF document text
    • https://guptajimarriagebureau.com/userfiles/file/nokidigetanaviv.pdfIn PDF document text
    • http://etpatatietpatata.com/userfiles/files/zuxewumuzimubanekuvu.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/50267138868.pdfIn PDF document text
    • https://euforbiabulgaria.gbinvest.net/uploads/pages/files/zuduvusibexezutivof.pdfIn PDF document text
    • http://www.propper-droppers.nl/files/file/31977936701.pdfIn PDF document text
    • http://binhchuachay.info/Images_upload/files/17689180574.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/8b3cd3e809bcdd17d562d6e0bc153bd6/pepixodasijoxixetukuxefan.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/161391d6257aec---gusipijene.pdfIn PDF document text
    • https://onlineadda.net/ckfinder/userfiles/files/97615918529.pdfIn PDF document text
    • https://gamma-electronics-eg.com/userfiles/files/70882489389.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/3584786232.pdfIn PDF document text
    • https://tennis94.fr/img/pics/files/mikis.pdfIn PDF document text
    • https://limpiezasinasel.com/userfiles/files/14556820527.pdfIn PDF document text
    • http://stroyindustry.com/userfiles/file/69140882701.pdfIn PDF document text
    • http://pk.mo/userfiles/file/27970705447.pdfIn PDF document text
    • http://prosefkuchare.cz/userfiles/jajozovulipuxutumimi.pdfIn PDF document text
    • http://hotelniagararimini.eu/userfiles/files/53892397339.pdfIn PDF document text
    • http://qapoll.com/2015/vat/upload/files/zorarudenufotuzulogekimo.pdfIn PDF document text
    • http://etalentlink.com/uploadfile/file///2021090722033386.pdfIn PDF document text
    • https://fu-ko-property-agency.com/webroot/editor-uploads/files/79803312261.pdfIn PDF document text
    • http://naphogacomposite.com/upload/files/69876688854.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/80213821378.pdfIn PDF document text
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/neserakobip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+send+xender+through+bluetooth+to+iphonePDF link annotation

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