Malicious PDF — malware analysis report

Static analysis result for SHA-256 9629bd9e378f527b…

MALICIOUS

PDF

92.7 KB Created: 2021-07-20 00:49:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7fcc747048f2d3ee3102e8679f61fbce SHA-1: 51f8c26a04ad2b4dc7b079072b9e78ee470da415 SHA-256: 9629bd9e378f527b4c3f1cc7561463c6ac01eba00691ef286e3f47b5d03c63a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and other domains, likely for phishing or malware distribution. The presence of embedded URLs and the PDF structure suggest it's designed to exploit user trust by appearing as a legitimate document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/d6273263358dca8d21c6ad3ba07bbdfc/97368742358.pdf In PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/1594044d8749384157553b6af9456981/balekelalexux.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/d4581d5911ebbe3b748b83124fbad810/77431760274.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16089cb428a191---jukozu.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/rilunubezamali.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607681bf57c96---72696751575.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/12207bbe6f3660239abb459a0cea2087/vatusagitonadevugoniwadi.pdfIn PDF document text
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/b6eff397350694a702f3e5a400f6a2f6/tebanul.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/20721455285.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/rixed.pdfIn PDF document text
    • http://prodottoitalia.eu/userfiles/files/kemasenenozuxike.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed77ed58cc---15839775121.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/02e2285c7fdf9a5f279ae4469e402f2d/xepaz.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160dfb411da88b---saxodilasukok.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/werijavefedoz.pdfIn PDF document text
    • http://oralrem.kz/ckfinder/userfiles/files/29123461207.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/33838330387.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/86070044762.pdfIn PDF document text
    • https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/a364b803aa9b736c5ed53d883fbccfb6/zosekudus.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986e9166fb6---68151197450.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/xojovuvuzefidat.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/a5da638c8b50b81e18cf5fe17c597143/razewusila.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/5mc4ncv0m6skilrfnu4epq3q0g/zulexavunawuxuluwomedape.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/92001814444.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=african+traditional+religion+pdf+downloadPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off00010607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10607 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011e1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E1E 10692 bytes
SHA-256: 701da66049ae4059a98f7144f9cf441f52295f8fe4f8293c6a9e50d6c161a683
font_02_sfnt_off00013699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13699 17388 bytes
SHA-256: f0bb5c12c029f230844cf040c7c7a5a7efb1f07873994b3d3f0ca8fe3488446e