Malicious PDF — malware analysis report

Static analysis result for SHA-256 745d806e190a852a…

MALICIOUS

PDF

70.3 KB Created: 2021-10-05 14:11:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 1a399db5d286cec86216ea17ed15d890 SHA-1: 7aae0bcdeec75b05bf6fedc4f668006fd676ed76 SHA-256: 745d806e190a852adcacb828893305871f381e09a8b8ddac53a65b7a37ead569
124 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The primary purpose appears to be directing users to a collection of other malicious PDFs, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7427

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://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614149880efd7---fuxubasewixanikeb.pdf In PDF document text
    • http://okudshava.ru/userfiles/file/98645033110.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153ed440a0e3---mazegozomuw.pdfIn PDF document text
    • http://store-connector.com/_upload_bilder/_filemanager/file/90917911844.pdfIn PDF document text
    • https://siam-royal-view.ru/data/files/31718750389.pdfIn PDF document text
    • http://uts.edu.co/portal/app/ckfinder/userfiles/files/rusisomukuxedarinidup.pdfIn PDF document text
    • https://e-midas.ro/files/file/vusorarek.pdfIn PDF document text
    • https://myshalewell.com/userfiles/file/14174219583.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210924145952.pdfIn PDF document text
    • http://mardeestilos.es/fotos/file/litetituzuzemugegogabago.pdfIn PDF document text
    • http://cascad-trans.ru/files/rodidub.pdfIn PDF document text
    • http://grubstreet.ca/ckfinder/userfiles/files/bixoxijosuketisupexaw.pdfIn PDF document text
    • https://estduquebec.com/scripts/php/xenocode/lib/ckfinder/userfiles/files/6742677744.pdfIn PDF document text
    • https://grandhotelushba.com/userfiles/file/81815240077.pdfIn PDF document text
    • https://turkihale.com/userfiles/file/In PDF document text
    • http://kokocurry.gm/userfiles/file/purifi.pdfIn PDF document text
    • https://pratham.one/file/87131497941.pdfIn PDF document text
    • https://ssekolkata.com/ckfinder/userfiles/files/16820360070.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/wowiboba.pdfIn PDF document text
    • http://bkmarine.net/ckfinder/userfiles/files/1631573310.pdfIn PDF document text
    • http://stlukesfp.org/ckfinder/userfiles/files/zuzabixep.pdfIn PDF document text
    • https://valerart.com/ckfinder/userfiles/files/milezenulegatufan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=text+inside+circle+photoshopPDF 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_off0000e3bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BF 17924 bytes
SHA-256: 9314e03fb035a0622d3c6afcc4ebd4fc546be93250701784e804fe13ac8e3486

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