Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f6d1f4a09f66fd0…

MALICIOUS

PDF

56.7 KB Created: 2021-09-09 09:35:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8a06ab22c51f29f99c7d60e5bf41b039 SHA-1: 85dff2f66670b96e12a4d71f0cbab30096c9b8b9 SHA-256: 8f6d1f4a09f66fd0e182e7ca0f4043bdab2f01b6fd5c5bdb180bce723166c578
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious content. The presence of numerous external URIs, many pointing to disposable domains and forming a link farm, suggests a phishing or malware distribution campaign. The document body is heavily obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7557

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/fazedu.pdf In PDF document text
    • https://alansglobalservices.com/ckfinder/userfiles/files/giturefovepis.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/faruwuxamofipabufuzeviro.pdfIn PDF document text
    • https://nieruchomosciturystyczne.eu/files/file/90786804345.pdfIn PDF document text
    • http://philipsphotographystudio.com/61349131279.pdfIn PDF document text
    • http://ippinnudon.com/uploads/files/dulexa.pdfIn PDF document text
    • http://ducthanggroup.com/webroot/img/files/79341705968.pdfIn PDF document text
    • https://baatco.com/ckfinder/userfiles/files/vimuvowelajazeninegeseve.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/tisesunasu.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16139851c71b4b---33520313948.pdfIn PDF document text
    • https://deltarents.com/upload/ckfinder/files/wigowuduwurivi.pdfIn PDF document text
    • https://inprovit.com/ckfinder/userfiles/files/wobameber.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/41649567455.pdfIn PDF document text
    • http://ruresept.ru/files/file/32348428333.pdfIn PDF document text
    • http://elskup.pl/images/assets/file/78472638405.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/tasidikorod.pdfIn PDF document text
    • https://cityface.cz/res/file/17456921531.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/lumelifipogab.pdfIn PDF document text
    • https://tekstilkentrehber.com/upload/ckfinder/files/bejusovugi.pdfIn PDF document text
    • http://sevvalturizm.com/rsm/files/sabopego.pdfIn PDF document text
    • http://www.fan-consultants.com.tw/ezadmin/ckfinder/userfiles/files/18876438696.pdfIn PDF document text
    • http://go-pxl.com/uploads/files/segeripa.pdfIn PDF document text
    • http://keramann.ru/uploads/files/luxudirekiwopifimixudiga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=el+arte+de+hacer+dinero+mario+borghino+pdfPDF link annotation