Malicious PDF — malware analysis report

Static analysis result for SHA-256 0db1492e3abde816…

MALICIOUS

PDF

98.2 KB Created: 2021-09-07 03:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 84e2c408715323d62898b2f3e7edb305 SHA-1: a6e2639418f6cfc9454285c152874633a0701c96 SHA-256: 0db1492e3abde816d9d062e732616298c56bb66f285a0baed0488a3317809ce5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The numerous embedded URLs point to a link farm strategy, with many links directed towards compromised WordPress sites or disposable domains, suggesting an attempt to lure users to phishing or malware-hosting pages. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://garglob.ru/uplcv?utm_term=mobile+application+hacker%27s+handbook+pdf+download PDF link annotation
    • https://widerbet.pl/userfiles/file/tuwelebozasawizojogetedof.pdfIn PDF document text
    • http://poultech.net/d/files/47487655697.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/vukixanowezanarutenepox.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/63294927000.pdfIn PDF document text
    • http://cherishedmomentphotos.com/clients/8/84/84fe84b553acfcd191e166b7401b6f02/File/92105110785.pdfIn PDF document text
    • http://hoteldazegliotorino.com/userfiles/files/romifegumexodekofatidonu.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ab91d07b95d---38243062338.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/2611939253.pdfIn PDF document text
    • http://bilateralmatters.org/userfiles/file/50083298651.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce441cdc994---jozomazu.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606dbea9e75a0---jeletedunenebatexamaboj.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/30894481901.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094dd9e7a802---sumexugepefoxeloziladu.pdfIn PDF document text
    • https://elsa-daulte.com/ckfinder/userfiles/files/vabuzukoxotimugu.pdfIn PDF document text
    • https://nonbodepsg.com/uploads/files/14408558005.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/pudg6a63b8svp9lbmfd5e7r8d3/47863421324.pdfIn PDF document text
    • http://englishplanet.info/ckfinder/userfiles/files/15567694329.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/79674612219.pdfIn PDF document text
    • http://www.motorradfreunde-toggenburg.ch/up/files/napegowepexa.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5a421b205---rujenazuliba.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c15835e3646---xikow.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/13795933974.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/a4kn42u5fvlrtr2tdt23gi0dhp/21340515578.pdfIn PDF document text
    • http://hb1004.com/userData/board/file/23443310761.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606f552b5bc78---pisitefoxi.pdfIn PDF document text
    • 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_off000117ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117EE 19048 bytes
SHA-256: 3d0b53bc0d515268ca5255662b9656de8942073009f1fdf064402268db167dff
font_01_sfnt_off0001492d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1492D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16144 11060 bytes
SHA-256: c6d50b1f0fef5eb10975ee0922c1504bc00bf81b82f2c971cb245942807dfedc

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