Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f02e9030ec79726…

MALICIOUS

PDF

87.3 KB Created: 2021-07-15 11:03:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 66b15ca0fffe4a4bd76246f0dd5db55a SHA-1: 456071c555693451e338875c8137340a9b8df262 SHA-256: 3f02e9030ec79726b247f47e356d3d29727c6a4ff920ee9e196d960ffdbf1e31
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, indicative of a link farm used for SEO manipulation or phishing. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://bishopsalamatkhokhar.org/userfiles/file/24183801973.pdf
    • http://twothirdsmajority.us/clients/38522/File/77302422426.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c373434bde9---65922524432.pdf
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/6aa760f8c453d85c249fd6297a7466e3/mudika.pdf
    • http://abwcrainhwy.com/uploads/files/fubalor.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/0047646e4f2872180103e7f3964758c0/46655591664.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e3b94ea4b---venejexuf.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1608f15258225b---nonuzaxinabifunosuxi.pdf
    • https://ivaco.it/file/minetemudedufuvuzavuzeto.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/oqih6p2074b9o7u00fofhvonm6/mafajojedudere.pdf
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607851d24b276---gemoxireguzokisijavumoz.pdf
    • https://htchninc.com/d/files/38621733745.pdf
    • https://istanajp2.com/contents//files/36414929861.pdf
    • http://umrllc.com/userfiles/files/18271858732.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/86a84a3db118ae97724e2870c90ea25a/potelotowanewugaxaneba.pdf
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/ffb2e00ef1df73b6fe051af42d85011d/60754864670.pdf
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/2tu96elq511i05r1hmu9semb3e/4417225010.pdf
    • https://xanbiente.de/userfiles/file/80059111600.pdf
    • https://biovuspharma.net/userfiles/files/3956754586.pdf
    • https://a2designbg.com/userfiles/file/55120349823.pdf
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/3l015oqbllo95qpmuh13dqpcv1/84321893536.pdf
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gofakufazugagil.pdf
    • https://xo-sound.ru/userfiles/file/kovasusubizonepawikibipe.pdf
    • http://crosswaysrecruitment.com/userfiles/file/1342927259.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160809fac21a9f---32672908123.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=weight+lifting+and+elevated+creatinine+levels
    • 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_off0000f426.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF426 16792 bytes
font_01_sfnt_off00010c38.bin
1f9f57b969b7f4f77b7f802f3c122c5b0fcbe62ac39dd2a9b797e600ee2aea39
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C38 16652 bytes
font_02_sfnt_off00013771.bin
9c31f6b6f1c36572417ff36e3c3b320a64c41a28137b4c99a15be1e1f4f85d49
pdf-font-stream PDF embedded font (sfnt) at offset 0x13771 10692 bytes