Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dcc387a8749438b…

MALICIOUS

PDF

60.0 KB Created: 2021-09-05 11:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5a0441755ccb4f7a1f93436245b25534 SHA-1: eb0630941191ea91c2ac716dc0eb77784d40bbae SHA-256: 9dcc387a8749438b050ea33e592fab47706502b472a87de088db5de842dd8a78
124 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and disposable domains, a common tactic for distributing phishing lures or malware. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. No scripts were extracted, and the document body was unreadable, but the link farm structure is indicative of a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4971

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 https://prcomponents.com/ckfinder/userfiles/files/nilowevegopawun.pdf In PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/2a2e36ca946ad61b7f36d70711ba07c1/zagafin.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084fd17287ff---pizobafadelowob.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943cf760b1a---33952281212.pdfIn PDF document text
    • https://jcmimoveis.com/userfiles/file/73170683908.pdfIn PDF document text
    • https://ebooksweb.net/files/file/15747303581.pdfIn PDF document text
    • http://mitroc.com/userfiles/file/gijadulula.pdfIn PDF document text
    • http://tatennis.ca/clients/29257/File/17420562689.pdfIn PDF document text
    • http://acmemask.com/upfiles/editor/files/46246798625.pdfIn PDF document text
    • https://gyandeepjkss.org/userfiles/file/97361463685.pdfIn PDF document text
    • http://fukaofoods.tw/uploads/files/202108232110258842.pdfIn PDF document text
    • http://coiffurenais.com/userfiles/file/fizemo.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/1s7kkcj4dgv9e4notq98l26401/44341768249.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/10823561932.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/59737169264.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210730_115202.pdfIn PDF document text
    • https://skiclubraonbaccarat.fr/pdf/sobadebatixovave.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/84521455430.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/128e496f5c66693dfbd4c8c70c9e6c59/raduzobupegigibidulazu.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/74102151127.pdfIn PDF document text
    • http://cafesezony.ru/fck_editor_files/files/81574390792.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16070ef5014eee---89600839336.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ccdce36dae7---6019302176.pdfIn PDF document text
    • http://hoanggiaphatstone.com/upload/files/87805793517.pdfIn PDF document text
    • https://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/6hjsag4fuclido5am24510aog5/detonobisefika.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+create+teachers+pay+teachers+worksheetsPDF 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_off0000b759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB759 10512 bytes
SHA-256: 9225f4842e3e3a15f808715dd04ffa88a613b54d18eba74044a77b7074eacc87
font_01_sfnt_off0000cf84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1