Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ab9dd7140ddd21a…

MALICIOUS

PDF

80.0 KB Created: 2021-09-07 03:35:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 25a62833d306e9e582ba414b34d7303a SHA-1: db0c3cd9be306bd59bd21ddbeb4a4110cba72b10 SHA-256: 2ab9dd7140ddd21af998ed0cc46d1d7a342272d16db5ef766e64e6128f098ba1
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lead victims to potentially malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://lapenya.cat/imgjovesnaves/file/66500067939.pdf In PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/vuiiiep4l693g1pkm2bf0aejg5/4613061809.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/lamixezagogapamopodaze.pdfIn PDF document text
    • http://sluchatka-shop.cz/files/upload/files/55370662479.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/36160277793.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/d6c495475b39dd8ffb1cbdd8d3d3804a/befajazazubuj.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2f0dc13f0---mikafisuxesewuroj.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/lopujonuxizida.pdfIn PDF document text
    • https://mavibusiness.it/file/lowarimexuteripe.pdfIn PDF document text
    • http://winkeleninzundert.nl/uploadimages/files/tabemizoviro.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160807d16cfb85---73499821563.pdfIn PDF document text
    • http://dentish.ru/ckfinder/userfiles/files/42380330679.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9500396b0---jaworumajenuzidopeles.pdfIn PDF document text
    • http://usmleworkout.com/files/file/zajorajukijafamunawo.pdfIn PDF document text
    • http://dentherapia.hu/files/file/72899073517.pdfIn PDF document text
    • http://rowsontw.com/shopadmin/upload/files/12777710705.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/29947465712.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160945cc73c5f0---80569851205.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e566a0d323---perujodusadolowugemopi.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/16129bbd1d9b92---fipefikap.pdfIn PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/21091102774.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/377a28cece4cff857200833836b03509/34870569571.pdfIn PDF document text
    • http://knowleangling.co.uk/ckfinder/userfiles/files/boguxifatuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=holt+mcdougal+literature+book+grade+10+pdfPDF 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_off0000d260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD260 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA77 11188 bytes
SHA-256: bdf45a28e2baebf4a7d19016dcfe55fdf4bb265a9e409600c0d78b59433f3bbc
font_02_sfnt_off00010437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10437 17592 bytes
SHA-256: 94c0fd3ed95a5d240e5353847212156c3114135a573df3cc1539a66192396ff5

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