Malicious PDF — malware analysis report

Static analysis result for SHA-256 69eb5cd3c2f289b6…

MALICIOUS

PDF

72.1 KB Created: 2021-05-14 14:37:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e12b3c2f4e753968cce7bc9186131100 SHA-1: 5ebdb927279d49386f2af11d2594ef6922e1dcd5 SHA-256: 69eb5cd3c2f289b638fdfca1cd443f84b4f9cbf39fe7c0ef567427c08ca72712
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing lure that attempts to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/u0ti4rtpk6c6usb3qqfeetcu3a/650639933.pdf
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e00cc7a4ee---sefetowetejipuvavobaguse.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4b2fd6d68---galipoderipejagujufo.pdf
    • http://bahattinburyan.com/userfiles/file/dajigilikegedewove.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16089b1fd311a5---56072383233.pdf
    • https://pypconsultores.mx/userfiles/file/nikenina.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ae1fafc0e---gufevaxopowadoli.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608537501498e---81872984347.pdf
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16095fe143652f---23680562093.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/c369c8fad1ec7584d87daa2e500f7b8d/23075759506.pdf
    • https://kvkumariajnkvv.org/singhania/downloads/file/19535306157.pdf
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160863e3a15784---fijetaxinojavusono.pdf
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/vvp7kd2aebr22t0e9qdnqkghl2/metisobiwefu.pdf
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4f653e059---tefotipepimavupugobos.pdf
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/b562804568f9777ec1e6fcdbb70b9c39/98857039702.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/rcc6rkl03k51mapm3kjkrf6ed3/56298730935.pdf
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/a6585ccafed401a4b805283bb744ac4e/kuxexuri.pdf
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/90f68d878d4759faef8740251054163c/29767253386.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=list+of+compound+adjectives+with+meanings+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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd51.bin
e4251df0b4937a4768d9d93a48a820ab2c762ef7f14963bf9c226b4d1b35878f
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD51 5612 bytes
font_01_sfnt_off0000f067.bin
7b63995772ee4c3ce7aa1b4bc221f9b456674e29e891d82a675d1d9bcc6a3a5f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF067 10172 bytes