Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2a6c1792cbeefb3…

MALICIOUS

PDF

81.1 KB Created: 2021-07-08 12:58:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 09e4e828419c59bfdd3469d61fe8c549 SHA-1: 17b43b714e6b49d19670d1de8f01dc5ab0debfb7 SHA-256: f2a6c1792cbeefb3e8fdcc07feb4468730667b4bfd7516555d3f58e85625a86e
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to compromised WordPress sites and disposable domains, suggesting a link farm designed to trick users into downloading malicious files. The presence of embedded JavaScript and a high ML classifier score further indicate malicious intent. ClamAV detection confirms this assessment, identifying it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://irlanc.ru/uplcv?utm_term=where+can+i+download+ps2+roms
    • https://maisonforville.be/documents/file/weruvulod.pdf
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a70eef2cca3---nesebijavikojopekimi.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16072f5681af38---fevunotifujul.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16097f7506c260---23533629429.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d0417137b4a---16865347994.pdf
    • http://maynenkhiinverter.com/media/ftp/file/donomu.pdf
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/cd5703edf8a43c1c82c1524322076bbb/11151319082.pdf
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/e9e2c631556c75d26e7d06581bf5ff84/52491349274.pdf
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/49891477efe96c0b5c6beda9c6638325/pabob.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/a94b29003442a6ff0f6d784475c03b8d/27442277438.pdf
    • http://drivingschool-brno.eu/files/lotezibizotugapituno.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/5mvcj99qgottj0lpfa2qvp35qp/50883816549.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/160cbafef0e9d0---25314953258.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/6qnel1bdt0rg8f0glbpdekljr9/giwasitugiboboxemofuko.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/aucofk3j29o5n3od3brsm8v88p/kujalulatu.pdf
    • https://imagebeaute.fr/userfiles/file/saxokopa.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a185357964f---57877404415.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a6cba8edf95---fanotekonibulopukamere.pdf
    • http://www.awakohchang.com/image/upload/File/4407862040.pdf
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba51b03e48---87484045856.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/ojpvpslf1t6nctniddh5blak1f/38638883492.pdf
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/16071b86eb7e25---83915460440.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6c25398b3---vuvoraxiwowoluduzasezekav.pdf
    • http://seanmore.com/userData/board/file/sonunonamawojulojixavupos.pdf
    • http://rafaelokazakov.com/file/nukunol.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/af718117e3044bff7b1e9782249c91f4/43665397384.pdf
    • http://batiment-tunisie.com/userfiles/file/79735808098.pdf
    • http://musclecar-taps.com/js/upload/files/29092555043.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_off0000d62f.bin
35aacf30c6ac9380f4f7325ee771e32f913ba083475ba5da30dbd9cd65848244		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD62F 10880 bytes
font_01_sfnt_off0000ef33.bin
371a5d5c65e111d16707768d741553b48c2c9e2786a85818c9324b2f6f2bb32b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF33 17808 bytes
font_02_sfnt_off00011d23.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D23 16792 bytes

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