Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d690318ed483ef0…

MALICIOUS

PDF

74.7 KB Created: 2021-09-28 18:25:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3d4858cc83315210396108fb9d0f4fff SHA-1: cd6d9943ab53e68e7f5d6bf6175ef89424d0b722 SHA-256: 8d690318ed483ef093be7e35a01453cfa2ad01dc2bbeebc1bdd09fc5e4846c5b
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it functions as a link farm. Numerous embedded URLs point to potentially malicious domains, suggesting an attempt to redirect users to phishing or malware hosting sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7520

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://sziszolg.hu/editor_up/22242299429.pdf In PDF document text
    • https://srilangkapools.com/contents/files/famezuluba.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/danalowizuzajutom.pdfIn PDF document text
    • https://lotteppta.net/beta/assets/file/64638160818.pdfIn PDF document text
    • https://dzido.pl/userfiles/file/92543821486.pdfIn PDF document text
    • http://hawaiianhunareiki.it/file/vumapobelu.pdfIn PDF document text
    • http://teamhead.net/userfiles/file/rukazumuvawo.pdfIn PDF document text
    • https://barrierball.cl/ckfinder/userfiles/files/94847232768.pdfIn PDF document text
    • https://jaurrieta.net/USERFILES_JAURRIETA/files/93511073706.pdfIn PDF document text
    • http://bharatandcompany.in/ckfinder/userfiles/files/68551404317.pdfIn PDF document text
    • http://wasserentkalkung.at/ckfinder/userfiles/files/7076802462.pdfIn PDF document text
    • http://tonioloclaudio.it/userfiles/files/venoxibujima.pdfIn PDF document text
    • http://yung-shun.com/userfiles/file/27850124009.pdfIn PDF document text
    • https://careersourceokaloosawalton.com/files/public/digimisejawuxewaru.pdfIn PDF document text
    • http://hotelborgodeipoeti.com/userfiles/files/94768657632.pdfIn PDF document text
    • http://birnagarcollege.in/userfiles/file/93465338817.pdfIn PDF document text
    • https://ketex.com/trcgp/ckfinder/userfiles/files/sesoxisaligib.pdfIn PDF document text
    • http://dcbestwings.com/uploads/files/puvujarujewozibipadalef.pdfIn PDF document text
    • https://domilot.com/uploader/files/fodijefilogenijasoretiwoz.pdfIn PDF document text
    • http://luyutea.net/v15/Upload/file/20219202351218083.pdfIn PDF document text
    • http://newtarrytowndeli.com/uploads/files/zedagakujevez.pdfIn PDF document text
    • http://kelt.pl/userfiles/file/tarekanipudapopuzokawo.pdfIn PDF document text
    • https://timavoshipsupply.it/userfiles/file/zulusi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=mapy+turystyczne+androidPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF076 10728 bytes
SHA-256: 67cfac6fdba4d39099b4f2f1bad81f9ea92a028891127cface9d85eb43523d89

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