Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bbcbb00995f8a10…

MALICIOUS

PDF

86.1 KB Created: 2021-07-14 02:13:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 028c2a303a0d7d4bb24c00ff38a8c10e SHA-1: 716258d9e541fbf237c84c7534cb71d08198faaf SHA-256: 5bbcbb00995f8a1036f95b9520d6c0a0ee3ae083dbed7b4e418e736a8077c69d
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to phishing sites or download further malware. The presence of multiple PDF files hosted on compromised WordPress sites reinforces this assessment.

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://canionglobal.com/FCKeditor/file/43458212794.pdf In PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e578d7d1a---78941919105.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a2895aab041225907d0f8b09295c72fd/xopesosezipereguzozuwe.pdfIn PDF document text
    • http://debseven.net/UserFiles/File/wunavovowosov.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/ebd9b8836a131b27125f7b53fe2420a0/14325471677.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d7e91b7d7---pamefujeve.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/73167d7b90ae385393402281212b253f/60943375385.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/2tudm3p4vhefm0abs0bogr2rq2/sadesokusufisudenezixop.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/7dd7eea6622a9ca08ce5d73d1c94c98e/fuwikegavule.pdfIn PDF document text
    • https://aokman-drive.com/d/files/4361077585.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/vawiziv.pdfIn PDF document text
    • http://runningrhinelanderrabbitry.com/clients/875187/File/musoziz.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/f9908fdc45a01f479849227669c0e2cd/rinuti.pdfIn PDF document text
    • http://cosmik-kinoteatr.ru/sadm_files/32582983847.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608bcf555372f---36821577697.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/f16djel47la2rjg8c8o3q8u558/samadotod.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/o2cgtd3mtm3pm11lug78nlp9i1/10543060804.pdfIn PDF document text
    • http://china-miyaco.com/img/file/202161604558.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/cb46bd8a0a2caa031e169d0c6022ee95/37966760919.pdfIn PDF document text
    • http://hifimarkt.eu/kunden/kronhardt/ckfinder/userfiles/files/15484811005.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/34948275219.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/cep6n69cm9k2605j4vo554elfq/16557228889.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/f0e2f8317312e5dedeee70fe3882e8e5/toluga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=position+of+queen+in+chessPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f01d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001082f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082F 16884 bytes
SHA-256: 85447310f9df834993cd728e43c67e5ab096fe075c68d143d5e89e2f045e364d
font_02_sfnt_off000133ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133CE 10372 bytes
SHA-256: f620c4a06dcbd4b1a30a8923adcf0617f777f162e71d0188c1f9e8e4b64b59fb

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