Malicious PDF — malware analysis report

Static analysis result for SHA-256 968abe6cdf72e247…

MALICIOUS

PDF

84.5 KB Created: 2021-07-04 22:16:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b64561c58ec461729a4d37a43bff6380 SHA-1: 7043578535cc63d7b7e0cb97e90a6c82b8be151c SHA-256: 968abe6cdf72e247d7b7f0b080cd0b7d09a8050e88a9595848d225a6855af613
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://nomylo.ru/uplcv?utm_term=think+like+a+millionaire+quotes
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/fenoza.pdf
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/1cc63d0ca302cbf0cabba80813b4e95b/5720878672.pdf
    • https://beautydiction.com/ckfinder/userfiles/files/87538809465.pdf
    • http://originalcheck.it/public/img_admin/file///66392089944.pdf
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608203f093b46---veneb.pdf
    • https://ascinfratech.com/clientprojects/trading/file/67257543196.pdf
    • https://123natura.com/stockages/files/fumanebuxajasukunot.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608544368ed2b---51534582732.pdf
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/btms3drktqc3ls9kp7qtkt1fms/pugepulopojuwo.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0ac878541---daxufagatisubexuma.pdf
    • http://www.kickcommerce.com/userfiles/file/wugelewewaxosusekesi.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/4b6d92dea201fb4a295ae627e088f7f1/90481933309.pdf
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/0d40a183122d81f786b5ede710b6b894/susosogiwozilopovigukano.pdf
    • http://xiaohecollege.com/d/files/55074359492.pdf
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adbdc71a958---kesubexanagoxasoro.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0f2d9886d---78976328971.pdf
    • https://sardavetri.it/userfiles/file/vatowurojizo.pdf
    • http://altelaw.com/uploads/image/file/xixegenajilije.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0ca5ca200---rapikofizek.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c1ba37f6c---78602933334.pdf
    • http://veterani-pushkino.ru/userfiles/files/xuvadidevilamutonebogu.pdf
    • http://www.vinoplaza.nl/img/upload/files/13208793087.pdf
    • http://kidneytexas.org/clients/861060/File/6539349863.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_off0000e853.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE853 16792 bytes
font_01_sfnt_off00010065.bin
8467a2ee8f888ea1d1b736c7332d10bd7e6e4c960a5bbaf524c5d842dfc34812
pdf-font-stream PDF embedded font (sfnt) at offset 0x10065 16888 bytes
font_02_sfnt_off00012c8d.bin
4e77e488f3f82958c41a478af1add8fd7cede927d519c774a796795789aba72c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C8D 10672 bytes