Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dd86694572790d6…

MALICIOUS

PDF

75.5 KB Created: 2021-09-06 05:42:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bf9db69cb190d0cd9389745eec47200e SHA-1: dfc938d722f7fa0eaa7449925363d79a29803602 SHA-256: 4dd86694572790d6e281274dcf7b5a7a774b9f6f279a8ba11ce8f0be964a2d72
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to disposable hosting and potentially compromised CMS upload directories. The presence of embedded URLs suggests an attempt to lure users to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://catamma.ru/uplcv?utm_term=pioneering+portfolio+management+swensen+pdf PDF link annotation
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609473b3b1c39---walukupoz.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076815757c6a---47349912847.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/zafitafulazopefe.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/varavepusededenapuxa.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/dexumopefolod.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/35529566409.pdfIn PDF document text
    • http://windmill-bv.com/userfiles/files/40094236726.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/28d88d1dfa83a8d37bc51f886695b8c3/rimax.pdfIn PDF document text
    • http://somsit.com/ckfinder/userfiles/files/ropagotavubenafurebali.pdfIn PDF document text
    • http://acquadiqualita.it/ckfinder/userfiles/files/sofemekejikogosidud.pdfIn PDF document text
    • http://thaymanhinhlaptop.com/userfiles/file/nexiraru.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607556bcd0c2f---kaloturigapidenizawurap.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/mf2bhhp8mflklqnkbii45vqqb0/murivu.pdfIn PDF document text
    • https://langumeistras.lt/i/File/budaparek.pdfIn PDF document text
    • http://photou.cc//ckfinder/userfiles/files/wixirufalidivagonituzutob.pdfIn PDF document text
    • http://irinka.org/ckfinder/userfiles/files/76287411046.pdfIn PDF document text
    • http://bud-drog.pl/userfiles/file/rekalu.pdfIn PDF document text
    • http://gasthaus-steinkirchen.de/img/editor/file/sevunu.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/6c92974adcdb146d6f8bcdf6852946b5/sugajor.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/texagiwinagakoxedazofuza.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/62087724055.pdfIn PDF document text
    • http://poney-club-romilly-aigre28.fr/userfiles/file/19823288599.pdfIn PDF document text
    • https://at2-turbo-j3t.com/contents/files/wetubewomino.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/jh6425ilpt6fdd925banmgvpo4/zaxezefevesuxijes.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_off0000c190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC190 16932 bytes
SHA-256: 390059250c134d77f97b5a3b0ccae90ca869d172743e4961a4af2a6a72dd1101
font_01_sfnt_off0000ed72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10589 10928 bytes
SHA-256: e9af014cbc599b13b7aeb167639329167eae977c5dfa1b16cdd650c1ddc2622c

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