Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f1421291d32403b…

MALICIOUS

PDF

94.4 KB Created: 2021-08-02 04:17:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 11462ac3c1b4d43ad8af80f362faa04d SHA-1: 01fadfd9a3c3fa61a6fef189803db7cfd59e3441 SHA-256: 9f1421291d32403b79936fad0a05a310dafc3ac4a0e88133e9d8936a2927b40e
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple URLs, many hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and embedded links suggest it's designed to lure users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607560deab64b---zawodowupaxamukasuve.pdf In PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/mifet.pdfIn PDF document text
    • https://lifecareproduct.in/ckfinder/userfiles/files/48611945325.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0c906bb53---91321140558.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/5eb851968820d7db3142b4ec5d3e8555/zabitazudikibep.pdfIn PDF document text
    • http://muskogeeroughers1967.com/clients/9/98/9899c641331876fb313f08ec475a0443/File/16388955346.pdfIn PDF document text
    • https://www.helmmsp.ca/wp-content/plugins/super-forms/uploads/php/files/8655a0b776c17af55a93b60bba4cdcda/migef.pdfIn PDF document text
    • http://jew66.cn/fckimg/file/32377167928.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/63736136788.pdfIn PDF document text
    • http://kartinatv.org/uploads/files/gupoxukuxalalidovade.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/91606397717.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/d05859b69f9253ec8fe73acc11096e0d/96206551789.pdfIn PDF document text
    • http://sovaimm.it/userfiles/files/251685171.pdfIn PDF document text
    • http://picassogift.com/Uploadfiles/files/80819911915.pdfIn PDF document text
    • http://ricarda-allegra.de/userfiles/file/52145903379.pdfIn PDF document text
    • http://teleinwestor.com/userfiles/file/dunujesepegavozofijole.pdfIn PDF document text
    • http://php-lounge.de/userfiles/file/16688958860.pdfIn PDF document text
    • http://abovomedia.hu/_user/file/40914889205.pdfIn PDF document text
    • http://movitecnic.com/ressource/site-image/files/lewenuzipelajan.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c9859a4c04f---sigonolagik.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/juromomu.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-2/20210502090323258208.pdfIn PDF document text
    • http://www.rify.us/cms-uploads/files/72221976064.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/b1dcf3842372b3facd2fd2495e74f66d/bubunez.pdfIn PDF document text
    • http://patokapugsnkisses.com/clients/61143/File/molapuvajixi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=what+kind+of+fuel+for+echo+srm+225PDF 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_off0001078a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078A 17812 bytes
SHA-256: 22281e0661a5478d4ec30bc635ee0b74f5b544b13c6e2917a5b44d9b5552615c
font_01_sfnt_off000136a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136A9 11180 bytes
SHA-256: 1ca7cffac615fd10affd892e953bd3c38fc8c07328e1eb7824f18fd7e4fc09e7
font_02_sfnt_off000150bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1