Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f1f6dc1b19d230c…

MALICIOUS

PDF

81.4 KB Created: 2021-09-07 09:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: cf644bc1eed9f3716e0be501a58ce4ae SHA-1: ce7e245893f29594a3a79775ba63bb9cf6305bf2 SHA-256: 2f1f6dc1b19d230c105fd712ef542c2d7b9daaa6c8d3a8149a72efe180f8f57a
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to domains identified as disposable or potentially compromised. The ML classifier and ClamAV detection strongly indicate malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document's purpose is to create a link farm, likely for SEO manipulation or to distribute further malicious content.

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://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1d5eca21c---ritatonakidiziwi.pdf In PDF document text
    • http://langeline.com/ckeditor/upload/files/48012215597.pdfIn PDF document text
    • http://generoussecurity.com/uploads/78471087220.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/18294373249.pdfIn PDF document text
    • http://www.prctech-th.com/ckfinder/userfiles/files/gotelupasidomelixubejifip.pdfIn PDF document text
    • http://dtyxbpzx.com/filespath/files/20210809034431.pdfIn PDF document text
    • https://dineflon.com//files/sefomilerusigutelisolubo.pdfIn PDF document text
    • http://cristalensi.com/public/File/87219351222.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/popuresujegonovivegiz.pdfIn PDF document text
    • http://altadirezione-consulting.it/userfiles/files/xaxozuno.pdfIn PDF document text
    • http://boothbayharborshipyard.com/userfiles/file/jimupuzobotone.pdfIn PDF document text
    • http://nuocmambason.com/upload/fckimagesfile/d29c458683f78368264ac484bf70f51e.pdfIn PDF document text
    • http://gilendor.cz/userfiles/file/zuzubukidi.pdfIn PDF document text
    • http://ilkyoukais.com/Images/Media/files/dusixojunisakige.pdfIn PDF document text
    • http://peak-experience-europe.com/images/blog/file/22635391792.pdfIn PDF document text
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a748d77f314---66703346181.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16080777295923---dukolidelufedisujulala.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/5d17e550866e4b21762b13c214f2e41c/wifivoxa.pdfIn PDF document text
    • http://logisticsnetworks.net/ckfinder/userfiles/files/zazal.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/09q8drgecosb6t11579c259scl/jovumelolosovunevitiwer.pdfIn PDF document text
    • https://imagebrandstudio.com/userfiles/file/56505467640.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/cb943db6bffec3551328c858f546601a/78016681682.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac865b28569---50709942513.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=png+pdf+mergePDF 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_off0000ddf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDF0 10156 bytes
SHA-256: e39f9cd9076e2b1ca717c7890914c1192b83884cebc5dee5bfd35ade6d8bf9f6
font_01_sfnt_off0000f451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF451 17048 bytes
SHA-256: 215632aa91af2a93ab454283ffe2ebb349bf78408ce0e0dd6f6a175d912a2c43
font_02_sfnt_off00012008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12008 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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