Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3eaecff5cc374ed…

MALICIOUS

PDF

90.8 KB Created: 2021-07-01 17:16:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2659b2753b63ece29d98c4fd49da8bd7 SHA-1: d3a16567af9576982908655da45bca4cb0f959d7 SHA-256: e3eaecff5cc374ed274830669b10eb1b9bf02ffe310c3cacd24eef8fec0c2499
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting, indicating a phishing or SEO manipulation attempt. ClamAV detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95', and the ML classifier also flagged it as malicious. The presence of embedded URLs and the nature of the link farm suggest it is designed to lead users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://foundryindia.org/userfiles/file/vivatunutelojexaja.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16094712283719---57779306311.pdf
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/0c84c454e86fc2c695ab910c904117f4/nopavotukizovesupetoxuf.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/0950152043ee3c5d480937aabe18dcf4/marabuboduf.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16078c8a3ebfd5---95089683112.pdf
    • https://htchninc.com/d/files/kifujo.pdf
    • https://koffiewarenhuis.nl/app/webroot/files/userfiles/files/86729463485.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/lbupsr258lbhl0car3ktd3ti9k/97266867337.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b885c435869---merovoru.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/nmi9ubsqkpd7j0evrrgiusj344/93577694168.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a45404afa3a---6236041436.pdf
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a5db2f84330---sazufelulovufukel.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/322fb4fce3de69e52530dfbf80f3126d/23244281284.pdf
    • http://hillandcunnreunion.com/clients/864369/File/bixadazozosevaw.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16082ef13efe2c---lidaxew.pdf
    • http://samsung-service-center.ru/uploads/files/16863534876.pdf
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/228glbjbnu88aq2jtq7lt896ua/jawadaxupa.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086cd6fe6f39---19896329588.pdf
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160bde77eef6bd---55939831529.pdf
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b94ea292c11---ginepomig.pdf
    • http://jrpst.pl/userfiles/file/vezagivimezetaruwuxufo.pdf
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/882e80c1afc45e39eadaf4614779f1ac/papugeguvimajodowiva.pdf
    • http://hgbs.de/userfiles/file/begomefutidegede.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=small+toad+in+the+hole
    • 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_off0000fe65.bin
65bdc78745887ddc9c0af77b62890809e9fccc62da48ec01fbdc187b3085a5ff
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE65 10320 bytes
font_01_sfnt_off00011563.bin
077d2e15591fc140817e1976745baf4f514bc80ba61dc320d6d99b1a31583928
pdf-font-stream PDF embedded font (sfnt) at offset 0x11563 17904 bytes
font_02_sfnt_off000144a0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x144A0 16792 bytes