Malicious PDF — malware analysis report

Static analysis result for SHA-256 125df5ae04ed1bcd…

MALICIOUS

PDF

88.9 KB Created: 2021-08-11 20:36:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3c2caad61de32ce45f7dc05824400a2c SHA-1: fb8a31aa5cf56abd95251c516ce318f67e9643cb SHA-256: 125df5ae04ed1bcd50e20d04e4379747bd627f7b33906d47ad8458033bc622c9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the links and the PDF structure suggest it's part of a larger attack chain, potentially involving embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://smidgel.ru/uplcv?utm_term=la+maestr%C3%ADa+del+amor+miguel+ruiz+pdf+gratis PDF link annotation
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9684153616---99876077459.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/9nkngu5uu9i8ka6v5e9008iock/widazabimupigu.pdfIn PDF document text
    • http://dijladentalcenter-qa.com/userfiles/file/doxila.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609e083ba63e7---duxesutodipuzoxu.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/836dcd00ea7088f751356f8e0ffa4359/noxupuwufuvobujoxugiremoz.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/cbdf4adbab6bdfea4a95203ea731067e/fowarowuzebivazifidewan.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8b6dcd1ec---gerixigodupedoreba.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16073bef9dac05---jinefapumoweranavem.pdfIn PDF document text
    • http://niktid.ru/userfiles/file/ditefezikofimufumuxazev.pdfIn PDF document text
    • http://srilakshmienterprises.net/uploads/zobaxitirem.pdfIn PDF document text
    • http://scandirent-new.ru/uploads/assets/file/sazefaz.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/03fdca68849383d30812d18d9ee664ae/33158112396.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b87e3cb28a---supawopezewaju.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/cae8997694c0b8e7d95177f6e105f5d1/66129972756.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/worowubag.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/61788242057.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/5a7363ba4034284524ea106aaeaf7878/79786407262.pdfIn PDF document text
    • http://staropolski.net/Upload/file/98766885796.pdfIn PDF document text
    • http://mojahotels.com/ckfinder/userfiles/files/pinipigesixif.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/1a8ae917096146589d3dbb5bf1827e21/84527811336.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/373193054.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/kenenevafatafodebidepi.pdfIn PDF document text
    • https://treasurehunterdetectors.com/ckfinder/userfiles/files/zilugureloloxik.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7897d48ca---jisegixurubedekikexulevo.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_off0000f08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08B 18756 bytes
SHA-256: c05ee59fedd4c099844fa76421c584bc99566258afc64fef70625a2ea8c3c614
font_01_sfnt_off000121ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121AC 10916 bytes
SHA-256: 22cc5876569c3e8a2230d05a6b07015d1eaec8c806e7877cc46193ecb93e8f53
font_02_sfnt_off00013ac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1