Malicious PDF — malware analysis report

Static analysis result for SHA-256 d242072c164dd1b1…

MALICIOUS

PDF

39.0 KB Created: 2021-09-12 16:19:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a6f253bedfd153b1755d7b715dfe31b5 SHA-1: 93bb6c8e92ce562d6f958a3726896ca4c60c352f SHA-256: d242072c164dd1b1a6106fe77c625368e8b6ac6e688842cabc506f9cea9f9b11
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is structured as an image-only document with an action trigger, typical of a phishing lure. The heuristic firings and ML classifier strongly indicate malicious intent, likely to redirect users to malicious sites or download further payloads. The presence of embedded JavaScript suggests an attempt to exploit browser vulnerabilities or execute malicious code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8579

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 39 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wyslijpaczki.pl/app/webroot/files/userfiles/file/83398421988.pdf
    • http://maychaybocaocap.com/app/webroot/uploads/files/falitowoxuwoza.pdf
    • http://iweldbot.com/ckfinder/pho/files/83368008880.pdf
    • http://euro520.net/userfiles/file/16305860582121883611.pdf
    • http://asja.ua/userfiles/file/xepaxazakadivolalulijewa.pdf
    • http://nanchang.chinatupai.com/web/js/ckfinder/userfiles/files/tipopikonobonedumazij.pdf
    • http://wxmx.cn/upload/ckimg/files/202109060835374588.pdf
    • http://nprofit.hk/userfiles/zisokekedixofewugi.pdf
    • https://tybistanbul.org/resimler/files/wudozusupamejete.pdf
    • http://fmdscu.net/userfiles/file/mipopenonibuv.pdf
    • http://daiichibus.vn/uploads/news_file/mibonagezizuzat.pdf
    • http://sancheonglittletheaters.com/upload/userfiles/2021/09/files/210911180843.pdf
    • http://sjatupornservices.com/file_media/file_image/file/81223296998.pdf
    • http://thebookmarkcafe.com/uploads/files/vosaxapaxibaxipepowesi.pdf
    • https://vadihosting.com/calisma2/files/uploads/pedov.pdf
    • http://gowowdeli.com/uploads/files/xabosajusoguxudilamipukiv.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=dark+eldar+7th+edition+codex+pdf

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