Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e0edf76b42370fb…

MALICIOUS

PDF

87.9 KB Created: 2021-07-21 14:37:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8700fdb2335dd308f6588a20f1594a50 SHA-1: 84414c10f937c6986a8ae4aa7069107c3cb75bdc SHA-256: 0e0edf76b42370fb8f2aa545287dc1c71cafca35a3649f73d543481256838bc6
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for SEO spam or phishing. While no scripts were extracted, the structure and URL patterns suggest the document's primary purpose is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.hon-ro.hu/userfiles/files/febuwoni.pdf In PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/20859201886.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1a577e46b---62674078314.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/rjlhrm0hpib7vqpig4ugbkhatc/dozikokerena.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/8j6btetdhkknfen3t3h3bttv74/90439855339.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/c7d7ad0500292617b413f0d70a68199d/21800437575.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb9c665c886---venumaxokakedaxupepovaka.pdfIn PDF document text
    • https://woodfur.in/userfiles/file/63896660511.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5d604432c1---komefegepefesu.pdfIn PDF document text
    • https://agermag.ro/mm/file/wosaw.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609da3ae20713---lixajek.pdfIn PDF document text
    • http://amicalelaique-guyancourt.fr/ckfinder/userfiles/files/xelapatepi.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca3fb2873bc---gaxil.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/lekizetosunanogisatiliza.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3dbaeea7b8---3655331917.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a075ff593ea---27446683971.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/57521241523.pdfIn PDF document text
    • https://rts-wm.com/ckfinder/userfiles/files/31005652211.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/ese2ccjvlhcpoghipjmpj6kk2n/vinax.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/87549607553.pdfIn PDF document text
    • http://ominocoibaffi.it/userfiles/files/lupiromedovuwikadezifowax.pdfIn PDF document text
    • http://unicorn-furnitures.com/d/files/58885112642.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/fedoposofeposekere.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/57967054311.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=muscle+contracture+causesPDF 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_off0000f74c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74C 16808 bytes
SHA-256: eb58a60daad012cfee634fee67b443ebc35cf1407b192c95847c075a5ac06396
font_01_sfnt_off00012314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12314 10224 bytes
SHA-256: 8c0acf5df1dd32fa1b22300815de69e7c933e92e43ea321078a301eafe5eefe4
font_02_sfnt_off00013a3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1