Malicious PDF — malware analysis report

Static analysis result for SHA-256 3df82ff8a1fb949a…

MALICIOUS

PDF

91.1 KB Created: 2021-07-22 18:03:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: f0653782a68421e97625e7893893037d SHA-1: 9b6212e9689d2433c48adf98de926d31643a0528 SHA-256: 3df82ff8a1fb949ae78781fdf534c98d317d69cd7c945dfd9e9a6fb0dedae04f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many hosted on compromised CMS platforms, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the PDF structure and URL patterns are consistent with a phishing lure.

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 http://brilsports.ro/userfiles/file///bawazumolofot.pdf In PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/6rngcgtroelgm087u2s82qj3fv/22504944071.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/rolezifo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160903696a3fb6---vagibasisogavefeji.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/6653668776.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/d26482cef60ac6c6a5a5dc57f54527e0/37945713660.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/e495ccf88a461665033d6a5a44f2939c/suvodebebajafane.pdfIn PDF document text
    • http://yachtandgulet.com/userfiles/file/kobajusovakilax.pdfIn PDF document text
    • https://la-klamm.org/Files/files/45304266495.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/nugofinijox.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8ae72e75e2---406061200.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/bec7b8677cb06793bfc0893915de83c4/50192327890.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/4lk1jhkbulfu7eqpp9mfj20s7a/werapijox.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/010e3cda43682eddfe2591fc7941e17e/40862494405.pdfIn PDF document text
    • https://alcoquimicos.com/ckfinder/userfiles/files/92239624176.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609452c4a5294---xiteza.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/zoximomexiwijadanekaba.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/popuzemuwufeke.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3ac8ca293---sewugepimax.pdfIn PDF document text
    • http://teranor.com/ckfinder/userfiles/files/gexikevepigutinuwewelulif.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093bb2a01907---zukow.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/883953dc4880415e3dc001abf422a04a/filidixibodeguzalal.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=template+cv+docx+freePDF 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_off0001034d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034D 10548 bytes
SHA-256: 73578a88f7c2e641c72498a329694e258191b5a7d891e957ddc6ebd03c97f13b
font_01_sfnt_off00011b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001337e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1337E 16964 bytes
SHA-256: 12645992237e9fe8137f58510b070ee399ab6c7ac0bf6f7f1f234020461baa30

Open this report in the interactive analyzer, or submit your own file for analysis.