Malicious PDF — malware analysis report

Static analysis result for SHA-256 22a1d58a9bd044d4…

MALICIOUS

PDF

86.6 KB Created: 2021-07-02 05:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 400dc5da3166498e523b5a05d761c2cf SHA-1: aaca6df6c611e37e70319191b8ed92740d6f2e4d SHA-256: 22a1d58a9bd044d429780831a6ab93c87355dd440edf29df594db429ed873816
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, indicating a link farm designed to lure victims to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these links.

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://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/7358d95606eab140e90e49218fa19ec7/bobanixofofut.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16074538e81879---vixunawata.pdf
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/07cqea633v83n66r6j8lqckpbq/48491775320.pdf
    • http://boisehighclassof1965.com/clients/879780/File/fifozenisafasogetejugi.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/343b702cb107e9c2a3f8009e902c55a2/vugagavaravekamo.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/90iggptg9qfgvkf39vfq2ln6mr/fezazivozoz.pdf
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/80e5f0fb75f8a52508be4c9310111fd2/jutudex.pdf
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb9cb56d8b---wezinetatimuzokanato.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1eb14e472---73860423107.pdf
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d796d303ab2---tutekubofulabijezasibeja.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/2d79f020cfc97555e5bf2b73d153d09d/zunojutuvisurumevewomezet.pdf
    • http://mywayrtk.info/userfiles/file/95185900622.pdf
    • http://servis-hradec.cz/files/file/25828049341.pdf
    • http://bjzjygj.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/makedakodukaniwodekori.pdf
    • http://farmina.ru/uploads/files/nifewopaxujabomonevi.pdf
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081631222350---mezajutawasom.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/sj36b6e5dlumo6qv919lm96if1/wanixazukisegep.pdf
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/85ae6ab7843d30c8f872fd0710eebd1d/26203692655.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072803e6fcf4---xamudikadogaj.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/759a6a0t92dfqs4nfk1tnj49p3/41272722644.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/6395eda58b842064d1245c62f8e4ef7e/bodulepedemofeno.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f2f33b781---13778342482.pdf
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079aa4014b9a---tigisez.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/81abc7c6bf39d995bd67769e3773ca1f/11471410166.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=sight+words+lesson+plan
    • 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_off0000f06a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF06A 16792 bytes
font_01_sfnt_off0001087c.bin
df3e0a71adbfc511af9fa2f374b711af9f9214938c173782b1b5282d356cf271
pdf-font-stream PDF embedded font (sfnt) at offset 0x1087C 16816 bytes
font_02_sfnt_off00013467.bin
874763538c9ff6b284d747a43d043f7af36fb23922c6c1c672a0aedba14360f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x13467 10832 bytes