Malicious PDF — malware analysis report

Static analysis result for SHA-256 2899a733158aa580…

MALICIOUS

PDF

84.8 KB Created: 2021-09-02 13:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9e825d1e6523203d04d673c8280b4c55 SHA-1: db8e31f48bfa94c79943330c9f9c93067b94b6d7 SHA-256: 2899a733158aa580fdcf9cc9bcd370ef9b529fa3d4836b4fe46e357226c6d90e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm intended to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/5464b21685ad99abc2dd9ee54e2d4755/38636021865.pdf In PDF document text
    • https://maspacientes.es/wp-content/plugins/super-forms/uploads/php/files/cfqn83mq043imel26j9nstmiel/84404507035.pdfIn PDF document text
    • http://interel-rus.ru/test/sites/default/files/file/relirazitibu.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/40fb34a0c58f6ffe0a19f90635232c7a/4444757995.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f93ae5626d6---31290124579.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/53bc6080fc3e808f86aa98077860bf36/13851670561.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/cf0369b7031c1605ac6723422be98fdb/23371359673.pdfIn PDF document text
    • http://zonwering-belgie.com/ckfinder/userfiles/files/dabov.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/6e3e927sfbdgn8sn8i0crno821/21869620799.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16087374961634---91771318448.pdfIn PDF document text
    • http://amdind.com/userfiles/file/wibogor.pdfIn PDF document text
    • http://egyptlance.com/userfiles/file/88230621171.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/964005c5a73a789d71c3fd329d1910de/zijofosuzed.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088b5dcd53b4---2764482296.pdfIn PDF document text
    • http://nanobubblevietnam.com/uploads/userfiles/file/97603330364.pdfIn PDF document text
    • http://yishiweb.com/upfiles/files/20210706_153400.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/81497033888.pdfIn PDF document text
    • http://bacsiha.com/public/ckfinder/userfiles/files/xupipuwanositutinijuvu.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f2db7e3ab---mezawapadixejekapo.pdfIn PDF document text
    • http://ttlh.vn/storage/ckfinder/files/tibemababofejokoru.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092ad580e95a---71045788650.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/nuvenevitutudunek.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/t0hhgg332n141iu9jfe98imolt/589694334.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/417f943f469e85c5b4e5e96b91896b72/96048194651.pdfIn PDF document text
    • http://colorsoftexas.com/ckfinder/userfiles/uploads/vavutetowafarugef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=idylis+chest+freezer+user+manualPDF 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_off0000e914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE914 10844 bytes
SHA-256: 02fcfd7af3954de24234d0179c154bb4088a15db8fef17f819b992937e0136af
font_01_sfnt_off000101f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A09 16900 bytes
SHA-256: cb8c2748120bcd220bb926bc9114ed36ff6935fead0e315723db75949c1ec817