Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8f129923cebd614…

MALICIOUS

PDF

90.2 KB Created: 2021-09-01 03:38:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 45e884605198d2a90a734f7e2e43b998 SHA-1: 5e114f1bbce1b85555a913263a86a43cde5a391c SHA-256: f8f129923cebd6142694afc1b6f080604356be3eed5594d7a3c4c934f06cbaa6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6338

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://langfordfinancialservices.com/userfiles/files/loniwekukifewopurip.pdf In PDF document text
    • http://pantryscan.com/123cars/imagefck/file/bizenomubidugubanixapuw.pdfIn PDF document text
    • http://100gastro.cz/soubory/files/44556238567.pdfIn PDF document text
    • http://hidra.it/ckfinder/userfiles/files/95106848132.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/a3c3718675d3c22b20f8314c8eaf7ed0/99455516957.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/13e0bd66d47c3be113e584a95e46d666/39053851981.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/2c20bb0316b3f83e25fd17f6009eb4ae/97016433417.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608681d2f3410---dunubefesawesi.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/budamewakezetitalado.pdfIn PDF document text
    • https://esprimagroup.com/userfiles/file/77613395639.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/82448823353.pdfIn PDF document text
    • http://www.ville-dammarie.com/ckfinder/userfiles/files/15715232523.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160cb1b783a1be---43615191501.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/dixugizo.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/697f1da0874cac2218750289cb076f74/2859812323.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ee71ab1a5dc---sezitatekumutege.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/1346c239278a9aa6b9b2ce1567f46283/33161267805.pdfIn PDF document text
    • https://marbellamohali.com/wp-content/plugins/super-forms/uploads/php/files/11cb69e88e29a8c949cf8a3dda974ef4/67892827410.pdfIn PDF document text
    • https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/3bg28727jm3oa5a08aki2uv3ln/1310615248.pdfIn PDF document text
    • http://isvpro.com/custom/files/31249049615.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f8ed1241e8b---mofuxivotadamipasugowo.pdfIn PDF document text
    • http://4darchitecture.org/img/all/namatesetozaledakamakox.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ecd3c4309d0---478748976.pdfIn PDF document text
    • http://momsystem.ru/public/file/14713541978.pdfIn PDF document text
    • http://jucal.es/images/file/67477278484.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/iorp83i7ljtgk3si3k8f4kvh4m/27825866437.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=poe+best+zombie+support+gemsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001226e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1226E 10584 bytes
SHA-256: 2c10617f1e486b56302561471fa38095e2cb7d410973f31115f19329cf7a26e4
font_02_sfnt_off00013a72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A72 18716 bytes
SHA-256: 9c92b3d80b0b7472aa8dcdd0bfdc5a316ba9728f8077c664a1b2e152488f38dc

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