Malicious PDF — malware analysis report

Static analysis result for SHA-256 3025c380d353fc82…

MALICIOUS

PDF

86.2 KB Created: 2021-06-28 15:05:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e5adbd18fc0731e3cb196af945468203 SHA-1: 46b39586452d68a1ecad255ae74cd7bc1a574533 SHA-256: 3025c380d353fc82928c3bd3a112a99af06fdf721294efeedb8b758891c5f368
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to lure users to potentially malicious content. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest this phishing or malware distribution intent. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

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://cructi.ru/uplcv?utm_term=numerical+reasoning+aptitude+test+questions+and+answers+pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/gonowabixuwexafizareruzo.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/9b8ddcc53651ed14675f57f0b05295a2/figotepubinunodixotovuke.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1607d47e34a944---32623936051.pdf
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/v4iltesee8bsm5nimk3i9j6ev2/nenovudaxadobesunixi.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608396cd6f485---sererugozeluxa.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8f7a991fb---71535408992.pdf
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1ac1c361b---69083036132.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/145a0af6f81c5da9f520a0de6b51e975/simodu.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/0c13d6720bebd2ec557a68a9b64dd0af/sosazaw.pdf
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abea975c7dc---xenozofesivoxe.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083bb2531fff---jevarikadafumelesowaf.pdf
    • http://playfromhome.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/zatoj.pdf
    • http://blessedfamilycovenant.org/clients/c/cb/cb727bc273eb4203dc66fb73741ae5ae/File/defetolubomakonisopap.pdf
    • http://alacarte-design.de/userfiles/file/nugunadimedumade.pdf
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/dunimodusomafaxoledusagos.pdf
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/d374826ad3f5059e156ade12b25dbde1/tukepezivukawidaditelokul.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a0feb1da5---51865025208.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160850368d20e6---voset.pdf
    • http://tlxzkj.com/uploads/file/250616572851.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c0483d41c6c---62610184383.pdf
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/78847916497.pdf
    • http://edu-family72.ru/content/images/uploads/file/47713898442.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_off0000ed11.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED11 16792 bytes
font_01_sfnt_off00010528.bin
eb105b033c8ad9acf5968d2f9f97e96f073be94baf672985e24473e856ba0df3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10528 11272 bytes
font_02_sfnt_off00011f26.bin
1f63424ae5ef66fd85c5496f59514e398a47c426b79dc4f1e91ba3d8fe716d24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F26 17036 bytes

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