Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d9e02753a5d250a…

MALICIOUS

PDF

98.5 KB Created: 2021-09-17 08:15:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 324d987ed0172694e765fd0c51123982 SHA-1: 3e47120fd33b8cb3119a88b2d716cd3af4b5693d SHA-256: 7d9e02753a5d250a95dc6cccb489333802c56e630058917f0b6c2992efc562d3
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which are hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier further indicate malicious intent. The presence of multiple PDF link farm heuristics points towards an attempt to distribute malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5935

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://hondasushi.com/uploads/files/japepamixejigekuxewup.pdf
    • http://vers-ma.de/userfiles/file/20141378836.pdf
    • http://mbjarrahi.com/UploadedFiles/New/file/58196459752.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c2d0b00fce---65880801110.pdf
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/69206948202.pdf
    • http://parikshitconstruction.com/uploads/27140282792.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/161359b1199d4f---pibiberolovus.pdf
    • https://pemaboutiquehotel.com/assets/userfiles/files/68370340710.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/uht9ok2at6vdsqcsnva93cm9e6/55051490935.pdf
    • https://0286869143.com/editor_images/files/32181572236.pdf
    • http://distant-property.ru/fck_editor_files/files/xevepuwotowajop.pdf
    • http://f-okinawa.com/img/tmp/file/70776089041.pdf
    • http://krevue.cz/UserFiles/File/95462706199.pdf
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/8c1fd1b49c5634e9cfc0bce93b005600/9139001846.pdf
    • http://frangarcia.eu/upload/file/95564115814.pdf
    • http://autoset66.ru/admin/ckfinder/userfiles/files/93258377575.pdf
    • http://danchrisjewelry.com/userfiles/file/papavovezuruxuje.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/5euubdifh5pg0mcdfj9et90t5e/95488081247.pdf
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/12004833895.pdf
    • https://ahirealty.in/admin/userfiles/files/89042608578.pdf
    • https://thaibamboorestaurant.ca/phpsites/bard_ford/uploads/file/82740093776.pdf
    • http://www.agot.pl/upload/file/nonotojojeg.pdf
    • http://www.culturehousesun.org/photos/file/83965155242.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=windows+7+professional+iso+file
    • 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_off000143ad.bin
2f9d90dc68abf9f12141142c5e1bc9cb8c4bde0637e4b98172e0e5036bce5fd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x143AD 20368 bytes

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