Malicious PDF — malware analysis report

Static analysis result for SHA-256 65c7ff6c01ab969a…

MALICIOUS

PDF

70.3 KB Created: 2021-08-01 14:59:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b11336377ca2b13b4927057bf0189755 SHA-1: 443f1159c8f5e513f5ae7e98b5cca317654d5793 SHA-256: 65c7ff6c01ab969a5d4b104c3f273a1256b7de8c18bd760a5bb2fe01864a6289
154 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution tool. The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting an attempt to lure users to external resources. No scripts were extracted, but the presence of a link farm is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9549

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://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607936514c01e---68913766184.pdf In PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/b11jgtgigaeg73sl6ak94spg5f/50148702983.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c25a97e9de9---76287552763.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/wafad.pdfIn PDF document text
    • http://baodieptailor.com/uploads/2021-07-07/images/files/6125076975.pdfIn PDF document text
    • https://traicaygiasi.com/Images_upload/files/85532491528.pdfIn PDF document text
    • https://batikatravels.com/userfiles/file/nekexuxotug.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/vajes500lrle48t368jhoapolu/mopopudikos.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/916cc71d99fb81a54cc751181e1b7a40/23927528665.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160afe3a41ae3a---vekesitazip.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/16084705ad931b---16635607701.pdfIn PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210531_0DBCD8359DAD9DF0.pdfIn PDF document text
    • http://elhammagazine.com/ckfinder/userfiles/files/velepebojuxujumotakurevu.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/vodapatigawuzo.pdfIn PDF document text
    • https://myclubowners.com/userfiles/files/rebokari.pdfIn PDF document text
    • http://cocoal.com/uploads/file/16658625313.pdfIn PDF document text
    • https://pacantioquia.org/aym_image/files/17027971864.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608342ab77cb5---sevuvomuvuxejamikawigum.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/4f07a0ddacfdca0a1f2f0af1574bef24/kepefevupunudojidilopodi.pdfIn PDF document text
    • http://stphilomenaonline.org/userfiles/file/jalawinopujak.pdfIn PDF document text
    • https://oklasik.com/ckfinder/userfiles/files/5043187624.pdfIn PDF document text
    • http://hocikto.info/userfiles/file/relarinewo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=how+do+i+connect+my+blackweb+headphonesPDF link annotation
    • 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_off0000ee7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7B 17460 bytes
SHA-256: 03dd79f8b5603a71d060183e2706a0f27b1bdbd97cf56de4aad318d052c3e385

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