Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd2ce3c722e3b8f5…

MALICIOUS

PDF

91.3 KB Created: 2021-07-02 12:26:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ab9a0da6d3bdb211f10d8070c6de6264 SHA-1: d875eb2de1410f840592366f4a3c28665d3cae2a SHA-256: fd2ce3c722e3b8f58cfb52fd5c335c88cc7ce1096c20f267d13b4c52e5344ae5
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites, indicating it functions as a link farm to distribute further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM heuristics reinforces the link farm nature of the document.

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://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae6d9b1efa7---modajorepegebakaru.pdf
    • http://matstravel.ru/userfiles/file/14975906522.pdf
    • https://karinbentum.nl/uploads/file/pazibizifixorijufuxojabo.pdf
    • http://wittlich-luexem.de/userfiles/file/kesisewo.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/23f8c466ee5555fef73b9b44b2fbe7eb/95648090683.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16082b471eff60---sudesawez.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2dea33990---72061523541.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d62283547---3563103908.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d382ea05ce7cf7524dbf4fbd74f47753/78828323764.pdf
    • http://westleyden72reunion.com/clients/4/46/469dc9162705cbff2d1fbe132f144f37/File/73416846670.pdf
    • http://alarcon-v.com/editor_upload_image/file/21592853086.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/6tvl02nkc1i6h2uh4o41rddc17/59933970887.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607696a9685cc---89659683003.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16087fad6bbedd---7704229565.pdf
    • http://lateonsettay-sachs.org/userfiles/file/10151275864.pdf
    • https://go2germany.ru/files/file/14742044776.pdf
    • http://chinalanpa.com/images/upload/File/vexepewawe.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d9414b301b9---14521352009.pdf
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/5b61bbdc1d4ccaff46fe88286da8b17f/99389364392.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160795af00a58d---kotetiv.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a310a3ba93f---soxogobiwosorezufero.pdf
    • http://sobsai.com/ckfinder/userfiles/files/9206755262.pdf
    • https://ajwatravel.com/wheelmarine/userfiles/file/medagemozoxasibu.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/b22eace92ac0c613ae4af003eed2777b/wafewilamorosewububeror.pdf
    • http://ssteelelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bipelubi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=compare+and+contrast+approaches+to+health+and+social+care+practice+based+on+psychological+theory
    • 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_off0000fe7c.bin
35e2c30e1271dc66a47566fac81b08846baf71e87e71e6f5c1e6735ec2b358f1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7C 16912 bytes
font_01_sfnt_off00012a63.bin
83d00a691068ede2e0aa53ae6dffdbe3b358d4ae999a3d5465e1a9f367c9c22d
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A63 11248 bytes
font_02_sfnt_off00014427.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14427 16792 bytes