Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2e6cbc24c2b554a…

MALICIOUS

PDF

80.0 KB Created: 2021-06-28 17:35:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9ada0afa01da06151d204fc66114e9ef SHA-1: 4c24050fa05f6b763780499ed037d7572bbe1e3c SHA-256: c2e6cbc24c2b554ad7777da3e43acde31f7d5ed2cd1ba0178c07108e85d6352f
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress upload directories, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc3c8c4263---jewifosit.pdf
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/ldhr5oohsia5ahn88qgkjoi7r4/rizijokebi.pdf
    • http://momsystem.ru/public/file/zipasaj.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/12utircrq7iqrbgk5egvo3vith/69362536840.pdf
    • http://demkapi.com/resimler/files/tolilew.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/63a784c4bc9545d5d29ad116b0e8a145/42655515386.pdf
    • http://abogarestudio.com/userfiles/file/pixamolufilafur.pdf
    • https://rcot.org/userfiles/file/60939757136.pdf
    • http://dentish.ru/ckfinder/userfiles/files/jumibularewazuro.pdf
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078e6fca05ab---mugipajodonudojegepifon.pdf
    • http://beiks.info/public/file/duvifejuxigetisatu.pdf
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/02c4c3d693cc807cb0bf99592de3a2e0/55575587755.pdf
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ad14d5309---75293724101.pdf
    • http://narnivet.com/userfiles/files/xovumubezakoposovegob.pdf
    • http://accessiblevehicleservices.com/userfiles/file/81922020194.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/8b8faqed0huvta03e45u6jak45/vedevarovuko.pdf
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/5peaur0cpcof5m4be5c49khj84/25695032178.pdf
    • http://cupta.org/userfiles/files/20210530004838.pdf
    • http://www.advokat.com/app/webroot/img/fck/file/91162518004.pdf
    • http://kamerton.nl/clientfiles/sedozuxu.pdf
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd19853f14---83299755150.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/nqnnk1crpnblf4edigks1f8m66/walalobufakamumi.pdf
    • https://dm288.rs/slicice/file/99465926626.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=impact+of+social+media+on+consumer+behavior+questionnaire+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://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_off0000d2d2.bin
9880818831305c7e1517e7080645ef04139e8d2e548af41c7a8e7daaac382753
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D2 16676 bytes
font_01_sfnt_off0000fe50.bin
287cf74433aaa30eb5f4f73cb2afe15f544842b1f6c16542f4501f5914caeac1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE50 11288 bytes
font_02_sfnt_off00011834.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11834 16792 bytes