Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e4a81f3591e907e…

MALICIOUS

PDF

41.5 KB Created: 2021-09-10 00:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e73ed18c7d9f1d2a9c6dd5e580341260 SHA-1: 6ba274f9c281db8747ea7de89adfa7a9929eb84b SHA-256: 5e4a81f3591e907efd89ea308128428ee4ea1ff6c6d71deca9928769f8a87699
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size, image-heavy content, and embedded clickable links. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8035

Heuristics 5

  • 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 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 https://booburger.myagenda.cz/pictures/editor/files/najosadodavijoge.pdf In PDF document text
    • http://leaguengn.com/userfiles/file///jojola.pdfIn PDF document text
    • https://pokereshop.cz/data/file/18581805464.pdfIn PDF document text
    • http://pribatu.lamilagrosaimport.com/images/files/kojirisinub.pdfIn PDF document text
    • http://tko.wavedev.net/img/files/files/6741919921.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/19916805934.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16139fbc344c0c---puzonezo.pdfIn PDF document text
    • http://wpklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tidovokerevi.pdfIn PDF document text
    • https://maharajganjtimes.com/assets/ckfinder/core/connector/php/uploads/files/87335826628.pdfIn PDF document text
    • http://muabannhagiare.net/images/uploads/files/lixifurowoteba.pdfIn PDF document text
    • http://kondicionery-shodnya.ru/upload_picture/file/61889045047.pdfIn PDF document text
    • http://jnmindia.com/outscapes/admin/ckeditor/uploads/ck/files/75763330750.pdfIn PDF document text
    • http://insei.eu/userfiles/files/juniwarajovitakamoribe.pdfIn PDF document text
    • https://www.zolmedis.lt/ckfinder/userfiles/files/puzusolipi.pdfIn PDF document text
    • http://sahcarpets.com/userfiles/file/83603233186.pdfIn PDF document text
    • http://twsl.mingann.info/upload/ckfinder_temp/files/20210904140120.pdfIn PDF document text
    • https://baruipur.org/ckfinder/userfiles/files/budagukelidenasejul.pdfIn PDF document text
    • http://sasolution.kr/userfiles/file/11440316416.pdfIn PDF document text
    • https://dpengineers.info/admin/userfiles/file/nupunokedagosiwogavosibe.pdfIn PDF document text
    • http://houselandia.ru/files/92229173353.pdfIn PDF document text
    • https://xn--80ag1a2a.xn--p1ai/files/file/sowara.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=free+psychometric+test+for+seafarersPDF link annotation