Malicious PDF — malware analysis report

Static analysis result for SHA-256 5094482c235f521b…

MALICIOUS

PDF

98.8 KB Created: 2021-07-02 04:57:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b45be2eb0267e40f0514f18c5fe7fb53 SHA-1: 79a4453939c74c31282062e798c622a3a09b87c3 SHA-256: 5094482c235f521b99b731f5fd01d6c03d82fc50eff671b8e59c4a912365e302
124 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to potentially malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to obscure the final destination and potentially engage in SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2938

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://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/vm9atbbkcsn0ga00tv3eegr95f/90343618874.pdf In PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160aa251f89043---89114523178.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd1316c4130---vilozemabovaxut.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/f36b8a9d569b64bd76ea5a2b96d49124/91928492671.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b4b3b77a7---60042989574.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/39896504285.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/65a1d6e20111a51533961628f3278c5a/xoposorud.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/2c0e202655d223713b52c0f0e491f0d0/tudeziwikebijeripi.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c428945c27---lewijamexepovapiz.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/30160094761.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/67301681224.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/9ae500bf5a5770c0c942620002710bc5/95197197307.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/pblfbll3k92lo2i75slbtmgjru/40988796139.pdfIn PDF document text
    • http://jogforbigt.com/clients/6/61/61f7a61d17da296148a50ccd59c4a139/File/retofozatotugetitadevo.pdfIn PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/gumufiwurakunaxa.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160800850d2d24---wujirojadawejewiva.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/mumik.pdfIn PDF document text
    • http://barsugo.com/ckfinder/userfiles/files/68321284474.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607856602bcc3---towudubekajim.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/83c7208cf3123d27817f92ab20385482/19191906814.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d47dd1dd13e---xobofumo.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/rezabejanu.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/33873tjc3kpriu2f2gh9g887s4/rodavoxe.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/1uqr16pc8d43162nh5a9ntntrg/foxidigiwividefuvipotezez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=facilitation+meaning+in+bengaliPDF 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_off00013be0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BE0 15988 bytes
SHA-256: d14c900fa5dcd8e4e01d77f4c7f2865ab8c0bbe78a30b4cf1b715d55bfe38411
font_01_sfnt_off000164bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164BB 10424 bytes
SHA-256: 18538bec0c9e2880812f1214a65ba369917d94f73f6d692e5ce19ea6527b3e5d