Malicious PDF — malware analysis report

Static analysis result for SHA-256 eda05ea0c5eaa0af…

MALICIOUS

PDF

72.0 KB Created: 2021-09-20 17:32:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bcafd6bd375d245e39fc9d49ca06bdd6 SHA-1: 98b3a85c80d309c940b296c531dbf6b8c20de16c SHA-256: eda05ea0c5eaa0af27ee5c7812c706bb83820b3d714decfaab6a6093a28ebb7c
64 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document was flagged by an ML classifier as malicious and contains numerous embedded URLs, many of which point to disposable or unknown hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is structured as a link farm, likely to manipulate search engine results or redirect users to malicious sites. The presence of external URIs further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6693

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 http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16134c380275d0---woduxinuzulazolifem.pdf
    • https://mediaget.ru/userfiles/files/96922180349.pdf
    • http://dissanna.com/temp/fckeditor/file/42320851202.pdf
    • https://marblobathware.ph/app/webroot/img/files/1811587114.pdf
    • http://capesociety.ca/uploads/files/71022535721.pdf
    • https://loctra.net/userfiles/file/tozapabigatadixunowe.pdf
    • http://evaemlak.com/userfiles/file///teratoxadoj.pdf
    • http://suspensionestg.mx/userfiles/file/fomuverapatapejabatufopo.pdf
    • http://gruppocreta.com/userfiles/files/budoj.pdf
    • http://homokkepek.hu/editor_up/4450473331.pdf
    • http://e-hematologica.pl/users/file/83281355657.pdf
    • http://jpsacademy.com/slbdavbatala/userfiles/file/bujodazulin.pdf
    • https://floridagreatescape.com/media/file/53272366335.pdf
    • http://thehedgerowchronicles.com/ckfinder/userfiles/files/68286289665.pdf
    • http://tianfonmm.com/d/files/kokanonineg.pdf
    • http://agt.es/files/galeria2/files/51832080089.pdf
    • http://mptech.vn/ckfinder/userfiles/files/tomuporozexufej.pdf
    • http://cathugo.de/res/wysiwyg/file/14882827653.pdf
    • http://vet-spb.com/userfiles/file/17976825609.pdf
    • http://mrcookie.tw/upload/editor/file/131559558108.pdf
    • http://jualumnitoronto.com/editor/uploadfiles/21740173385.pdf
    • https://demircanticaret.com/userfiles/file/bipiguwevupada.pdf
    • http://www.amedna.com/userfiles/files/12381975892.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=offline+cooking+games+for+android
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed11.bin
8bb15b5bb48ee9b5a1a8003102d9d408a8f72a525936b684bb8cba6833b19b2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED11 10836 bytes

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