Malicious PDF — malware analysis report

Static analysis result for SHA-256 29d27b1b25b6e9e9…

MALICIOUS

PDF

82.6 KB Created: 2021-06-28 13:38:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7632e395a8387ea29b304a62d9c43f58 SHA-1: 599342f38b40205ac716d945cefa3d168a009849 SHA-256: 29d27b1b25b6e9e9d029c1a58c76d159f5dd278cf8965166af856a297f0255cd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users to malicious content. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of a malicious document, possibly leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://huntic.ru/uplcv?utm_term=is+salt+a+compound+or+a+mixture PDF link annotation
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/c024ff6e4e2d65a6960dfca1eaab4864/tudivibivenexoxu.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/4htk4o70903nnvajrgkhdogri6/dakedibubizugavag.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d06fbd183ac---diguwabalofativugapasifix.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16092069b4045a---gonez.pdfIn PDF document text
    • http://kasaitogo.com/uploads/files/ruwazusotezu.pdfIn PDF document text
    • http://atek-ent.com/upload/file/jolanap.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/3efbd06122e5fa2265c34abc3a58d0a3/pelitubugopix.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f23f2b195a---refupivujovimobopo.pdfIn PDF document text
    • http://volamtuyetthe.com/userfiles/file/72151462725.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/8016f8ae98fc6e0fed9e9d4ad48b5a0d/lijegipizenomowipes.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/ferubawezir.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/67ee1a413bbd7cc6829725bdd609d19e/4027808249.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/gatofeforu.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160abfc034188d---rejakufetizubusekikep.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160709704cafb2---sirokipiwobokolir.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074af397651a---tipanepojunew.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609995aa53271---39981374509.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac47cca7ece---93716855135.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/g6qqnkubaoa15h3c6hfopn2dle/wovabipajilotibutufe.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/b21fd656b8122cba868b9d72070b82eb/tetonemamapiri.pdfIn PDF document text
    • http://sunnysideclassof64.com/clients/a/ac/acc4ccb49d7935ca36198347b895393e/File/48809687606.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_off0000e07e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07E 16280 bytes
SHA-256: a83c03a3dcf88e5b7eec2363e9ae0a81c8641b1c01e32c3f3f2c5448ebbd1ca5
font_01_sfnt_off00010a72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A72 10828 bytes
SHA-256: 6942ede6c55f43bf0ad6a533690e320a97389c5414e58a0df866eaa6c5ca9298
font_02_sfnt_off00012369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12369 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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