Malicious PDF — malware analysis report

Static analysis result for SHA-256 80b426b7bef74e6f…

MALICIOUS

PDF

91.9 KB Created: 2021-07-28 00:17:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: bc7c58b1c9c9d1a7761883ab447e2128 SHA-1: baac23ecb7e98f9b2b4de783819b49e663b3c192 SHA-256: 80b426b7bef74e6faa3ba55440f0121ecb4095de0276f957ff2a46e64f8c6d42
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories and disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160e08e1032742---dunapo.pdf In PDF document text
    • https://mytalk7.com/_UploadFile/Images/file/wetuzakabadibeta.pdfIn PDF document text
    • http://perseverance.cyou/updatefiles/file/24753967147.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609cff57915fd---29308247432.pdfIn PDF document text
    • http://ashioke.com/images/library/File/54301813394.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/85730702241.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/sqafg4r1l6r7ahund2qmt9slai/davoko.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/00laf7h1qdm6b4gpflnga6ks5b/90516476513.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607906402e886---46921597881.pdfIn PDF document text
    • https://dijitalsanat.link/upload/files/93686564002.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/0eo4tlspf1gfc1vnom6pj9m83b/bonewepozafovexefabevilur.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/pun7j1on2lthi4t4713osm5d0f/7741296896.pdfIn PDF document text
    • http://trunglam.vn/uploads/userfiles/file/zisisimipamijonadodagubam.pdfIn PDF document text
    • http://1night2day.com/ckupload/files/13028177083.pdfIn PDF document text
    • http://heldermusic.nl/ckfinder/userfiles/files/96560457249.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/2596npuidnsu80rklimvpc3ik6/7602391192.pdfIn PDF document text
    • https://tradingphrases.com/userfiles/files/19910848831.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/ed7227008d4afd6459c1c63218a2a2eb/37404041342.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4612a8eb2---27302236112.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940fadc33ec---98808925340.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/lefolovokadumituwogirijez.pdfIn PDF document text
    • https://saatyapi.com/upload/ckfinder/files/43036449004.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/n3dnsdmv55pc85grjs441kpl31/32451540714.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+use+speedball+pen+and+inkPDF 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_off00010489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10489 10692 bytes
SHA-256: baf912096c9c6673f61467673ab5ba92235827c5e018be7ad476ebd853dfa866
font_01_sfnt_off00011cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF5 17044 bytes
SHA-256: fdcfc3d9b8e48259287bb8001cc3203b136893511b5757cc1f0d2e37c41d177d
font_02_sfnt_off00014972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14972 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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