Malicious PDF — malware analysis report

Static analysis result for SHA-256 d259e0294e967c88…

MALICIOUS

PDF

63.7 KB Created: 2021-09-19 01:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5949bb41859d101c5cebe4a5adc721d3 SHA-1: 490fd86d5dbc0d111a53e16ff4cb8f67390aa8e5 SHA-256: d259e0294e967c88f562c803f1e99355314763418903ef3b3d629c7d19656a5e
94 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting domains. The ML classifier also flagged this PDF as malicious. The primary function appears to be redirecting users to external sites, potentially for SEO spam or to serve further malicious content, rather than containing an active exploit within the PDF itself.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8566

Heuristics 4

  • 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 https://drafthe.ru/uplcv?utm_term=dean+cortez+mack+tactics PDF link annotation
    • http://www.s4b.nl/upload/files/88262071557.pdfIn PDF document text
    • https://mytshirtcreator.com/app/webroot/files/file/34142071132.pdfIn PDF document text
    • http://brickchamber.com/ckfinder/userfiles/files/gupat.pdfIn PDF document text
    • https://e-casainteligenta.ro/userfiles/file/zoxagibazovakujikukosego.pdfIn PDF document text
    • https://drlalashow.com/php/billboard/uploads/file/35460444000.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/161333fad9aad6---semefufumokilele.pdfIn PDF document text
    • https://n-tlg.com/files/file/18659261578.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/8180434d5650228499981db53c027fb9/jezifiner.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/a67d88a4b3eb238140199af8585bea17/62595017000.pdfIn PDF document text
    • https://petrovsky14.ru/docs/files/93543552708.pdfIn PDF document text
    • http://shopabrang.com/images/files/68606301888.pdfIn PDF document text
    • http://fishngrill.iorderfoods.com/uploads/files/mamixeb.pdfIn PDF document text
    • http://vincitydata.com/uploads/ckfinder/files/bexorevafubakazarajiga.pdfIn PDF document text
    • http://hotelborgodeipoeti.com/userfiles/files/5014776017.pdfIn PDF document text
    • http://life-homeshop.com/asset/uploads/files/60545069583.pdfIn PDF document text
    • https://sadex.pl/fck/file/fefukalunifaxixi.pdfIn PDF document text
    • http://dienlanhtruongson.com/upload/files/tixutawasigekalona.pdfIn PDF document text
    • https://comfort8889.com/upload/files/tozizuresakedepizo.pdfIn PDF document text
    • http://tulga.ru/editor/files/33274469153.pdfIn PDF document text
    • http://tongrentangthai.com/UserFiles/file/45114501250.pdfIn PDF document text
    • http://www.itidharamshala.in/images/uploads/files/93970540859.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/22824470544.pdfIn PDF document text
    • https://inprovitpuertorico.com/ckfinder/userfiles/files/14188753347.pdfIn PDF document text
    • http://pandoraecza.com/genelresimler/file/taxop.pdfIn PDF document text
    • http://harposwebdesign.nl/app/webroot/files/userfiles/files/vemij.pdfIn PDF document text
    • http://pes.edu.mn/ckfinder/userfiles/files/nizobefefoxovibuge.pdfIn PDF document text
    • 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_off0000e243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE243 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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