Malicious PDF — malware analysis report

Static analysis result for SHA-256 c62ecc646df15925…

MALICIOUS

PDF

86.3 KB Created: 2021-09-01 19:51:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7008475bfa0bc6a8bc7c060504852999 SHA-1: a069c0b17b36a4c25883a4468a53d70d8a71cb96 SHA-256: c62ecc646df15925979303e6478e46c7a37c2c81172da758ad8c54adddc55f6a
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to lure users to potentially malicious destinations. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://infrive.ru/uplcv?utm_term=hunger+games+catching+fire+online+stream+free PDF link annotation
    • http://bezagsecurity.cz/userfiles/87458940635.pdfIn PDF document text
    • https://vidaleve.net/ckfinder/userfiles/files/84968932241.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9de32a47b---dufokesepinofus.pdfIn PDF document text
    • http://www.odnpoznan.pl/fotki/file/file/38691978320.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093cbd1c5db4---43529440808.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c84ebbe7129---53637880517.pdfIn PDF document text
    • https://pollackmihalyiskola.hu/ckfinder/userfiles/files/xogiguvepagilevadimajiwuz.pdfIn PDF document text
    • http://czdashan.cn/uploadfile/file/2021050904341873499.pdfIn PDF document text
    • http://praconsulgroup.ru/pict/file/gunigubufexu.pdfIn PDF document text
    • http://blankheich.de/images/uploads/file/jifimesufofipijunimofutid.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/4b156d42a9722e13f6b5066b0914a1da/71803854876.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/ttfdm8def1prn52f0sbfd5phk0/17568907226.pdfIn PDF document text
    • http://longruiglass.com/ckfinder/userfiles/files/20210831_102426.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e40e89804f8---ruvusi.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a394bd4fd1d---zetirerevat.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/jts3usth8i604j3ehuefrb3nui/45985820266.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/eb77fdfb0294ceffa72cc6f7458b480f/nixubog.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160fcaee08aa26---96302447637.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/fipojuzakedan.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/68015510529.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/lixexirigux.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/xilazirovimeletirakefez.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd7ededb4f---69050242695.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/68374001130.pdfIn PDF document text
    • http://impressivetravelvietnam.com/upload/files/tetedazejepopukage.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/a3c22eb515ad6b62cd7e56c3d9768d67/65822479610.pdfIn PDF document text
    • 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_off0000ec5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10471 17792 bytes
SHA-256: 484782ecb099c08f859901063046005095dc68a705db20b26e42bb793c8ce4e5
font_02_sfnt_off000131e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E0 10876 bytes
SHA-256: a428b6c716992d9a53967e9892a87b834ce878f8be513561ece3616770e0d78f