Malicious PDF — malware analysis report

Static analysis result for SHA-256 511e7da0280bd898…

MALICIOUS

PDF

80.1 KB Created: 2021-09-19 12:50:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 560a1d81ad66746af843526172084537 SHA-1: 5464e27122d34fc29596c0f419ca99c160c0752b SHA-256: 511e7da0280bd898324e3ab29dd612e1840c195beeb8a4302ee4ce3292e096d5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting. While no scripts were directly extracted, the nature of link farms suggests an intent to redirect users to malicious content, likely through embedded JavaScript or other document exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://cdkuys.handysociality.com/upload/files/ziwititorimokirisa.pdf In PDF document text
    • http://elektrostroy.kz/ckfinder/userfiles/files/fusizodijujorumer.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/nawaxupukosukogepuk.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/6856806167.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16130ffc39ed7f---74764474769.pdfIn PDF document text
    • https://kar360.com/resimler/files/mimovoveba.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141e2d6edce4---83363876243.pdfIn PDF document text
    • http://goldenteriyaki.com/uploads/files/13002255112.pdfIn PDF document text
    • http://srs-budapest.hu/uploads/files/74327957647.pdfIn PDF document text
    • https://matricula.netlandschool.cl/files/pipimupafoterix.pdfIn PDF document text
    • http://morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc5317cc9c---65556498865.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16137ffa83fe0d---xabujiminuberoz.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/ceab78e74c533d9cfb229b55107b0c57/2523859151.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/bdb1848fe61a73757ffa232a9de661e5/xadutavuxin.pdfIn PDF document text
    • http://klubbelgickychobrov.sk/editor_uploads/files/83913251454.pdfIn PDF document text
    • https://get-insurance.in/ckfinder/userfiles/files/97052545110.pdfIn PDF document text
    • https://distriparkbotlek.nl/userfiles/files/92727851864.pdfIn PDF document text
    • http://kukubara.com/zdjecia/file/74091684965.pdfIn PDF document text
    • http://furnitura-syndicat.ru/ckeditor/ckfinder/core/connector/php/uploads/files/50581252914.pdfIn PDF document text
    • http://hawaiianhunareiki.it/file/66583778412.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161380ec205c8f---gigosebi.pdfIn PDF document text
    • https://eownauto.com/uploadpic/files/32248791120.pdfIn PDF document text
    • http://schokofontaenen.de/idata/dekibewuledawubix.pdfIn PDF document text
    • https://www.padanguparduotuve.lt/ckfinder/userfiles/files/xavipebuloxal.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/47839540078.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=sat+2+biology+real+tests+pdfPDF 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_off0000d4b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ecc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC6 17216 bytes
SHA-256: 1cc9c9e69925f2101e1cae84bc4d6cd2a2bc833cfe94df64bcba2a138a2f293e
font_02_sfnt_off0001196f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196F 11020 bytes
SHA-256: ee488e57dea1ef8f7b2e788490fde0bb9a8fcee0f92206bd7fa812efb4a38007

Open this report in the interactive analyzer, or submit your own file for analysis.