Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e36e0ebf6c232d…

MALICIOUS

PDF

84.6 KB Created: 2021-09-03 18:34:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: df3179a32143d6e8c6d677f8dd39fbc7 SHA-1: 8188e467df75847e541415a4b318d4727b9d76d0 SHA-256: 26e36e0ebf6c232d53b6c165cdbf14bce43bf0a7686a44a7e339161b60fa55d5
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress sites, which in turn host other PDF files. This behavior is indicative of a link farm designed to distribute malicious content or phishing lures. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. Although no scripts were explicitly extracted, the structure suggests it may leverage embedded JavaScript for redirection or obfuscation.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4473

Heuristics 5

  • 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
  • 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://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606d80d127f3e---gugujeledoxudarejonu.pdf In PDF document text
    • http://agama-rc.com/upload/files/bazaw.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/f4n50sgh4o9uqjur0revqd1t55/pilalalutawexir.pdfIn PDF document text
    • http://thetachikappasigmaalumni.org/clients/5/56/56ac51e2ee760b54d3ff8b7d53c877b7/File/21786371746.pdfIn PDF document text
    • https://asiahealthcaredentalcentre.com/ckfinder/userfiles/files/87659639314.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecf473a723---23902173716.pdfIn PDF document text
    • https://www.campacinter.com/image/upload/File/tunubuziwufapexafegepe.pdfIn PDF document text
    • https://jaiminsales.com/ckfinder/userfiles/files/kowabowano.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/161042e26100c9---56383120955.pdfIn PDF document text
    • http://www.schule.havonix.com/ckfinder/userfiles/files/lasogulobila.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/np24423lvh6j2ftbjrfabep9v4/givibikidevesobakitegire.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae58825cf9e---xofot.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3719cc91d1---subolivexiso.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/d723a2046188bebbbb393cdd6097eca5/gobulesufef.pdfIn PDF document text
    • http://teaandtiarasmontreal.com/clients/f/f0/f03dfc1790708d0b03c48e9879ef2ea6/File/46917847285.pdfIn PDF document text
    • https://rivieresoceanie.com/userfiles/file/zujoremirodorolagu.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/53587756630.pdfIn PDF document text
    • https://aparcaderoshaddaichile.cl/uploads/images/files/9914487425.pdfIn PDF document text
    • https://md-bud.pl/szklo/photos/file/77463689165.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c28cf7534eb---61150191565.pdfIn PDF document text
    • http://health-bridge.in/upload/file/duxumalikupejivadej.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/72dis7s9hv8k5n1ctqk8v2l9h4/korexofedum.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16096cb380cd85---66900739996.pdfIn PDF document text
    • http://effekt-film.de/files/file/loxomibomopanuvokusugoto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=approximation+pdf+for+sbi+clerk+2019PDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10099 1680 bytes
SHA-256: 6c08887b596ecb472c5a0482df8c2f828d83fc5b5d16111ed0caa1fced1b35dc
font_01_sfnt_off00010896.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10896 11560 bytes
SHA-256: a80bdbc5fd4b356945f4c150ebe8d4c58643bf32c17d67b10e5d5abbb5df5c5c
font_02_sfnt_off000123ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123EC 16160 bytes
SHA-256: fa5cbea137587b1d4bb1c548ff3f8d17a18587fe273de630a8d80f12e69f99e4
font_03_sfnt_off00013987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13987 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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