Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b6ca1a982a41889…

MALICIOUS

PDF

65.2 KB Created: 2021-09-28 07:28:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a6ca31622a3118487f283549b1639a15 SHA-1: c57a5f252a3c799de7384384f1e4373f2f94f59c SHA-256: 6b6ca1a982a41889400b24213a0556f24edf6c7ebdeee7a5bc287a24a8d5c9d4
64 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are structured as a link farm. This suggests an attempt to direct users to download potentially harmful files. The ML classifier also flagged the PDF as malicious, reinforcing this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5956

Heuristics 3

  • 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://hexema.com/FCKeditor/file/maxoseta.pdf In PDF document text
    • http://abcbyspu.net/ckfinder/images_store/files/romevoroketubabogix.pdfIn PDF document text
    • https://optimuselearningschool.com/learning/site/images/uploadfiles/vuserapefexigide.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/bbe95972574a9938e48be6d5be1ed448/65046875191.pdfIn PDF document text
    • http://sgrappresentanze.eu/userfiles/files/18699588231.pdfIn PDF document text
    • http://studiofranzoni.eu/userfiles/files/kawovalu.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/faseb.pdfIn PDF document text
    • http://bentleyplemtech.ru/userfiles/file/30440560137.pdfIn PDF document text
    • https://harteron.ee/userfiles/file/24584718382.pdfIn PDF document text
    • https://damsindia.org/admin/uploads/file/romepalufumolupevosizer.pdfIn PDF document text
    • http://commissioncollectionlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/10100623213.pdfIn PDF document text
    • https://chung-pei.com/userfiles/file/2978486583.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/vakejamogagumulusekiname.pdfIn PDF document text
    • https://cottonweb.net/userfiles/file/33006873221.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/26693488732.pdfIn PDF document text
    • https://polytex.de/sites/default/files/kuwigabi.pdfIn PDF document text
    • https://support-trevianum.nl/userfiles/files/44728832124.pdfIn PDF document text
    • http://ebrinteractive.com/userfiles/file/xujadaxokagibadipiwo.pdfIn PDF document text
    • http://pierrevillers.fr/mairie_files/file/44589600599.pdfIn PDF document text
    • https://lederstuhlshop.de/ckfinder/userfiles/files/tipog.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/18733141598.pdfIn PDF document text
    • https://euronet.stonavka.cz/webpagebuilder/ckfinder/userfiles/files/8242196165.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/64311108580.pdfIn PDF document text
    • http://artio.pl/files/files/64119870717.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=pocketown+apk+download+latest+versionPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB321 17196 bytes
SHA-256: 26a716a65062cf5e88a6ade25ae4ab45d819d355a0191e2389af79a7e4a17c70
font_01_sfnt_off0000dece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDECE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1