Malicious PDF — malware analysis report

Static analysis result for SHA-256 290badea5e6a7d8d…

MALICIOUS

PDF

86.5 KB Created: 2021-06-26 13:02:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cc1399dc0f8fa1f6d34589d95d09b1f3 SHA-1: 4e20a94d1011ee741537b648597e17d5067657f4 SHA-256: 290badea5e6a7d8d8222c5741cdbfb72a164b9c78ef8280b2fd1b63bf8d6030b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many pointing to compromised CMS upload storage and disposable hosting, indicating a link farm designed to manipulate search engine results or redirect users to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://inwebjor.ru/uplcv?utm_term=marketing+in+travel+and+tourism+pdf
    • http://lyzebrno.cz/userfiles/file/fokofano.pdf
    • http://greatnice.club/updatefiles/file/48860727704.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082fa22b0730---diseboxezofopexalogiza.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff1fb69e53---61953551314.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/d701259fe61c85495501cc9c1f1da404/dunepewikofamadawu.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160713b22e5dd8---siwekeguxanaw.pdf
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa6da634b3---43823664690.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6adf604c56---28579533357.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081bc67703a5---gegenudinanufefejilobub.pdf
    • http://samuiluxurytravel.com/Uploads/file/rixekovanumobudawifav.pdf
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/489fc729504474bd5ff820aa77953ca2/wibalavebuv.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/hpo5bmkrod2hqnk8blv4jjudi4/pirekotedejexitabivawom.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16084ce46d0e3b---wazubigejotasaxule.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ce52e26eb---pifabepo.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa2620ec15---45123662278.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb75b11a522---89112347116.pdf
    • https://menlopark.com/wysiwygfiles/file/gowedozezakuko.pdf
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/45768373169.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/ssg80r4658q3io0rvj9cumbqej/jovubinibidovokax.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608c403e29183---35028929040.pdf
    • https://hissekurban.com/resimler/files/mezenuwizoruvisan.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160824efd26661---fenirisatagim.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a468dcd9627---mavozilimaparesavogat.pdf
    • http://anhuifan.com/upload_fck/file/2021-5-21/20210521035111417020.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edaa.bin
e0360beea80bc73877ff9ce676cb9204c288fbf4d78953d8b43519b155d80042		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAA 11092 bytes
font_01_sfnt_off00010754.bin
3d4aebdbbf37faa6f9dfc1ab27ea30699da577fa9e550ba3613872994e7edc6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10754 17396 bytes
font_02_sfnt_off0001347c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1347C 16792 bytes

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