Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae9246ffeae6c8f…

MALICIOUS

PDF

165.7 KB Created: 2021-07-02 15:21:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5fab41d09b4ca3b84ce0654c40157ae5 SHA-1: a70022a6e47877307b8be47469308ac790ddcada SHA-256: 2ae9246ffeae6c8f565fdeac57f2489b545b44765a26389fd22d6eb0a6d0dda7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites, identified by heuristics as a link farm on disposable hosting. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. The embedded URLs suggest an attempt to redirect the user to malicious content, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9735

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 http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16094233bb88e8---tagodisimezexetudoduvo.pdf
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/6aac1ece09fa207d2407a394a12950c5/feruxoka.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/9adebd4f51e2a78fbbf18100faed2e6a/parumikiminaf.pdf
    • https://travelworld.ro/userfiles/file/sapemuwesovanokifuwawafar.pdf
    • https://netshopnepal.com/userfiles/file/97777266587.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/ur21co5s5oo20mee0vij51hnk7/70115236193.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbcd7beaa6---sukekukom.pdf
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/16097468361581---tenezikejisolowovupunejaf.pdf
    • http://rafaelokazakov.com/file/dokexum.pdf
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/2b17e5df0496d5c5da78dd3310efe070/sejud.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c0e9734d849---juzirugowilube.pdf
    • http://www.anieliasfx.com/uploads/textareas/file/nulib.pdf
    • https://tolgyesvolgy.hu/userfiles/file/43468948108.pdf
    • http://cancercareresearch.com/userfiles/file/balavimisabibo.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ce0a8717966---26539945406.pdf
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097171385fb4---furowug.pdf
    • http://redactron.com/userfiles/file/69839259069.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089d91f7ced6---45349977090.pdf
    • http://wrhs1967.org/clients/6/61/617565fc8afb9cc6d18abf932d248b7a/File/moferisevakuta.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16081f36fc10b0---xijemosipelanominuwugad.pdf
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/aibapud6k5po49vas7vtgn6eu1/repulolugurex.pdf
    • https://securityguardsupply.com/php/uploads/file/xozenanaxim.pdf
    • http://www.derbysignandgraphics.com/uploads/file/10554133548.pdf
    • https://akrmedia.no/ckfinder/userfiles/files/sugokotulajaxesegesaw.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d154d9d87b---dozobaxizisukojido.pdf
    • http://moreit.ch/productinfo/file/mizurofitoxine.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=review+of+forensic+medicine+and+toxicology
    • 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_off0002241e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2241E 16792 bytes
font_01_sfnt_off00023c30.bin
8530cb702b3c40a2790fc371df347cd86e27d9350f04d52a7f3e239bc2949e34
pdf-font-stream PDF embedded font (sfnt) at offset 0x23C30 19028 bytes
font_02_sfnt_off00026de2.bin
59861a8d093a3f0553b42c0d0138342da3ecf5ef74b40338070f3a4285d1faa9
pdf-font-stream PDF embedded font (sfnt) at offset 0x26DE2 11232 bytes