Malicious PDF — malware analysis report

Static analysis result for SHA-256 32f32171add0bf6d…

MALICIOUS

PDF

58.1 KB Created: 2021-09-28 20:47:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f7fd5e6b67333832a1290b738d04303b SHA-1: 638522aed12f981d752f28a73b3345a45d0d0dcf SHA-256: 32f32171add0bf6d3df5071b1ce5f80f3a80c7fdb8e9e51b1127cdb2141a6249
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, forming a link farm. One heuristic specifically identifies a link farm on disposable hosting with UTM parameters, suggesting a phishing or redirection attempt. The presence of embedded JavaScript further supports malicious intent, likely to facilitate redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5367

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://oniceh.ru/uplcv?utm_term=oreo+tv+star+channels+not+working
    • http://aaas.handyfriendship.com/upload/files/21060899868.pdf
    • http://www.firstpages.eu/app/webroot/files/userfiles/files/bisetadimavepejitiwad.pdf
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1613ad809ddc97---tomitisotag.pdf
    • http://alrabbancapital.com/file/files/zitilesogalubuwutof.pdf
    • https://pgp-puh.hr/fck_media/file/wukedisixewotatevejotafa.pdf
    • http://mientaytourist.com/uploads/files/69788509899.pdf
    • https://ises.ca/phpsites/vertical_living/uploads/file/veberupuzi.pdf
    • http://tmacfashion.com/ckfinder/userfiles/files/sabirosugejurapiwomexij.pdf
    • https://planningpvedh.nl/ckfinder/userfiles/files/didibepuputulipaxilurowe.pdf
    • https://goldmenu.com/userfiles/file/tafurowawedeb.pdf
    • http://worshipedia.net/sites/default/files/file/rixudoweler.pdf
    • https://easternresources.net/ckfinder/userfiles/files/winusanivubuvob.pdf
    • http://terwaarde.be/ckfinder/userfiles/files/26980178175.pdf
    • https://gamma-electronics-eg.com/userfiles/files/544756768.pdf
    • https://suacuasathcm.com/uploads/files/35281335997.pdf
    • http://fcraregistration.com/UploadedData/file/98915119386.pdf
    • http://duplisite.com/userfiles/file/98662999838.pdf
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/suritumofeko.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef56475a8c---68596815909.pdf
    • http://asorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tevogesa.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/bf7f0cad78d7b3e86c831664f8e22ca0/pajopuwivin.pdf
    • http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nevowozov.pdf
    • https://www.hotelrestaurantmacarena.fr/ckfinder/userfiles/files/69692882764.pdf
    • http://fd-health.com/upload/ckeditor/files/82147649596.pdf
    • http://vesimport.ru/userfiles/file/52975454904.pdf
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161417123bc5b2---pekamegobobiraze.pdf
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/nimogoxudivepusunabisebo.pdf
    • https://agriplan-rs.com/dados/ckfinder/files/feregorefoxenizemefigaj.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9e3.bin
ae0499dd9fd625969aff6558a7b9a9ec681c29760ea94d183ea4eb4924d4a74a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9E3 10780 bytes
font_01_sfnt_off0000d2cb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2CB 16792 bytes

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