Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c0d0dfee5ebb1de…

MALICIOUS

PDF

83.3 KB Created: 2021-08-18 20:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 08e6a1d1038e07c2106d9b9b6cdf11d4 SHA-1: 711e72aa2c257c38e0b8f8b8f9f73624233b2539 SHA-256: 5c0d0dfee5ebb1de988ed204ea4e67eaa2f770d4fcf50e07e0d85a6f37b46c17
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised or disposable hosting domains. The primary attack pattern observed is the use of these links to potentially deliver phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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://srilakshmienterprises.net/uploads/41989968023.pdf In PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/073d1c78588b8009e6e4a119c63d2e0b/60630169339.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/lnc59buouand6h8b0rfspgosq3/domimarisafox.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c72107e44dd---6047266647.pdfIn PDF document text
    • http://www.darvidproperty.com/news/file/kivezerufonu.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/d99140b4514e4e7e7611c23fcb7f1a0e/65231422839.pdfIn PDF document text
    • http://thsport.dk/ckfinder/userfiles/files/16871865660.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606d55b68e9e3---lodenojipopopeve.pdfIn PDF document text
    • http://www.corazondelsol.es/ckfinder/userfiles/files/zusubajopetu.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/pasakuburabipezew.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/9801bd6db5d5ba3d9a69e0e6fd1ecd5f/kojixenederiwaxisigitigad.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/35274379427.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8cb2d1e28---99751049938.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b85e1c3857e---54826404345.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/976c3a0d0ce2fa1f8445d29a7a31a57b/54799227737.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/94843719889.pdfIn PDF document text
    • http://hzbmsj.net/images/upload/File/fegufe.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/fiwuwawimuna.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-1/20210501101516203808.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/1b1961c19e1b4f99b470b9901b164e4b/63607525756.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4ba92b90d---94749699025.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bf121cce3c6---87022328862.pdfIn PDF document text
    • http://tumwebthailand.com/ckfinder/userfiles/files/64231614004.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/51085424159.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ce9b076dd---lopajegaxaxukopexuva.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c460cc698---10912552045.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=producto+de+matrices+ejercicios+resueltos+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_off0000dbd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E7 18368 bytes
SHA-256: 9ce2c3a4c7ba9c0a143cfeac3c264cb08e7e872c7f32fdf197c43e3b52e6f643
font_02_sfnt_off00012324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12324 10908 bytes
SHA-256: 017c6cd47bb7be0dc45e2c60d0d2847bb692248e84d7df0f8e85ece34e3a5222

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