Malicious PDF — malware analysis report

Static analysis result for SHA-256 3094e6b46da49b62…

MALICIOUS

PDF

84.4 KB Created: 2021-06-28 10:15:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 8e9df2bbc90f0a0500a80aa384b79edc SHA-1: 31eb001f70e9a0b5a9b3a482df25acfd3e78afb1 SHA-256: 3094e6b46da49b6234c0704624d52264415c5928e63b964e871da2fbf4d8b1d9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was identified as malicious by an ML classifier. It contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm or SEO poisoning tactic. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, indicating it's not intended for direct user reading but rather as a container for these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • 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://irlanc.ru/uplcv?utm_term=how+to+reduce+hip+and+thigh+fat+fast+at+home PDF link annotation
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/967bda1466fd076a689584b7a97c7436/33182444951.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/888e4f02facbf2971aa4c7ecd4e227e5/63152472655.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/6cde2221206c8643ba3314aad4ad30e2/liwomutaxivesibeda.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/a9b2bf5c65b6634533b79ca392d6bd6d/xetopifawesaxubavameb.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/918716aee30525673afd09278bdec69c/93098050015.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/68659297629.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/31276579104.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ec263c2bf---37079937161.pdfIn PDF document text
    • http://chinalabware.es/d/files/nogirajuvevajowezotu.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210531181047.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/bb2023b0be85ad32cb56c7a3390db5f8/dopevisag.pdfIn PDF document text
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/4cb86201c462e93ca0a49088c7e71d19/84450117679.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/146268cdd83cef2ef743b6115bd41f37/92147678223.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/1c98d6900e2bc3d2c324026ebbab2330/xinuzuviwawafo.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609541063a795---fubuxobujesadomuruzu.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/ec563e302679ca7f4ca3e304ddd344ea/36560979621.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae3d65a31f5---11452666647.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/fif104a0ddh818qghv5bh1eseg/81701529238.pdfIn PDF document text
    • http://nesemlak.com/test/images/uploads/files/77761765545.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/5ded8899836ceb379bb051d3a6a22d99/77283866419.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/jewizawevitularix.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/3d79dc691a99e95004b1db1f61de82fc/52949033183.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_off0000e834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE834 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10046 16432 bytes
SHA-256: f07c4f9f1870ae597b0af84576aa35106c8e52da237132736e12a545ad6166fb
font_02_sfnt_off00012a65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A65 11200 bytes
SHA-256: 8b356ee58236df640f150a0cfbef74f5cda29a77052d7a42a5e69d63d1e1f4e7

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