Malicious PDF — malware analysis report

Static analysis result for SHA-256 e52d9f34f08bae36…

MALICIOUS

PDF

99.4 KB Created: 2021-07-02 06:19:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 13cc1d4b2d71d05513d830b7033e9509 SHA-1: debe05239a24f40afcd62c5cf68ee278cabb43a0 SHA-256: e52d9f34f08bae366b9ab0aaac82b70e02e57bca6dc7034090813caae104534f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://garglob.ru/uplcv?utm_term=damaged+sphincter+muscle PDF link annotation
    • http://www.lnk-creation.fr/upload/file/fadopamidotujuku.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/0h1gh1ogdgj4qn9u48hj0lu3f1/26439094627.pdfIn PDF document text
    • https://onlinendttraining.net/files/79840846988.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/q86tfoj6bcauh3bfu7tj6hfj1m/82917802022.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/b070858688a208730b405799f9879d63/nivijamawusonasinikaxaf.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/5f915285761f55348eeeb9c8e883f0e8/xixefolu.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160af17d1613b6---41663829659.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071607b22faa---68034740957.pdfIn PDF document text
    • http://dhf-china.com/d/files/senasabupaxelunuxemu.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3786e8dadd---12103604587.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/xanepogoxavewubiseli.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/kj59d0gjakvbrvg2s4ams88l7j/49670333777.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608941aa0a0f8---rigom.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088b3543378f---72800737292.pdfIn PDF document text
    • https://biorenta.lt/ckfinder/userfiles/files/22632724705.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/zobov.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/531fc0ce1227767490c0b2718ee38269/23130407195.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/100ndbbuql4sc7ugh02muqmduc/89751598465.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcc73be8227---potewukelit.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bdd2c27ba---59482113173.pdfIn PDF document text
    • http://bora.su/ckfinder/userfiles/files/josujuvakokaseworazige.pdfIn PDF document text
    • 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_off00011d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13588 19484 bytes
SHA-256: 2877ec40e3c9756ac590a49a12841feda5d998d3379a0ce6cce036cc0e6758b4
font_02_sfnt_off000167d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167D4 10944 bytes
SHA-256: df3025223a58af929b919232cb76ac4cb51bf84ccbb2add9782ebee2fe56a129

Open this report in the interactive analyzer, or submit your own file for analysis.