Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e49cb75222fec5b…

MALICIOUS

PDF

89.0 KB Created: 2021-07-08 03:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9edbe9c5beb8168c3e7011a409837d61 SHA-1: cb82b088a49944e6cb945eb4533e9582e944ec68 SHA-256: 1e49cb75222fec5b18939ec41bcbc527f4bc9c26752d971a98e3820d293c4a60
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites. These URLs are likely used to redirect users to malicious content, such as phishing pages or malware downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://medvor.ru/uplcv?utm_term=innovative+recycled+building+materials
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743b9450a4f---zopidowezedonodekut.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5e0e84e5d---devigakis.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/13de586ece6c0bdf33da2bef7d419e5f/borirofiwejozir.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f143cd4afc---vabeg.pdf
    • http://regimhotelierbucuresti.com/images/userfiles/mawixaxug.pdf
    • http://www.aqsclimited.com/EditorImages/file/64880959297.pdf
    • http://agcslohian.com/userfiles/file/64773840510.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096263940461---pefeguvibiwofuderune.pdf
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/73156125861.pdf
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8fd8781f61---ruruwipufunudojiwamisu.pdf
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609d04a1093d7---wewizumogilumudovuv.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8c41408f8---sewavuv.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/6g76ngu7v8oiu15amflh458sg7/61612277445.pdf
    • http://kondicionery-fryazino.ru/upload_picture/file/61760516477.pdf
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160846ae583e3d---17756288774.pdf
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/a5fe877de8c1f64c338b9273f0cb3d29/sezegedojekekusixorojeko.pdf
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16077f3c4895eb---68650342455.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eecbd5607a---12070818769.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/r1gkhlcn2ahee8hvv5hue2ihd8/23175970940.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a653ea0a4a0---91675283795.pdf
    • http://reicar.dk/userfiles/file/39730164485.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/89f9f19063540fd14e487098a0881d85/21975366127.pdf
    • http://www.kilincsweb.hu/fileok/file/bapazabanodonisolasegokor.pdf
    • http://dtcguild.org/clients/80367/File/pugetomovorumufumukiboge.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/3046914d1bbd4fa0dae2bad57c16d72c/rejexidemize.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f935.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF935 16792 bytes
font_01_sfnt_off00011147.bin
0de753bc420f4f91e6b7ad7fe03bcd6e87f91a5cfd5b4bbbb842c72e249416a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11147 16884 bytes
font_02_sfnt_off00013d27.bin
6ad2ffb03fa97e6b74a69162c03dad1700593a233e360ac79c5aa30629296dd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D27 11084 bytes

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