Malicious PDF — malware analysis report

Static analysis result for SHA-256 08ceffdd47d7f5a1…

MALICIOUS

PDF

166.7 KB Created: 2021-08-02 00:58:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ea323dddd7e843825effb2db5f023fa0 SHA-1: 48741cddf86c49fcbb6e4553a832f221280548c1 SHA-256: 08ceffdd47d7f5a1bc90818365e9b2e4c874d7f3494ba5ca2ffdde76cf7276c6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of external URI links further supports the attack pattern of luring users to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://pixomot.ru/uplcv?utm_term=zig+ziglar+secrets+of+closing+the+sale+barnes+and+noble PDF link annotation
    • https://www.dolphinrfid.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbb86e90f5b---57146419710.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160783cd033150---lotig.pdfIn PDF document text
    • http://sevoir.hu/uploads/file/75185528766.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/ba02be822b1a1efb6a37fb0c2195fb83/33155723458.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe8862473a---4112101443.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/oi6n82391hsma0id16mr7rkdch/37085997391.pdfIn PDF document text
    • https://grancom.by/upload/docs/vumajesekagamik.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/105b45cffcefdbbee898ed777d58f83f/26696045620.pdfIn PDF document text
    • https://etimes.mn/uploads/files/lukuvagitape.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/53310572612.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/99d6dd84e4ef4de804aeba7f10236f83/33837134234.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/54980338950.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8ba923955---selej.pdfIn PDF document text
    • http://rheinmotel.com/userfiles/file/83384689483.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/18628092262.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/706bb8aa432465e143f9ba8cd05c424f/zanojomudetofinaluxenexu.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b1f2acba509---19384505751.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/3p2g17pp84618kpham6opdtkjq/dipovinavore.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/v37f012u9gec6d29s5igp32bib/sudasexepatatuk.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a5e17f43a---vifobawatuzaroruv.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f06344bd4---16481336989.pdfIn PDF document text
    • https://vantainoidia.vn/ci/userfiles/files/27225100968.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/95051126681.pdfIn PDF document text
    • https://magyar-logyogyasz.hu/fileok/file/movidetukipopezurirudekad.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_off00022492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22492 19744 bytes
SHA-256: acf4df9377f8f006ee4a0bc71bd3c7d222cb25d5ac935766b0e6dd02e1492c06
font_01_sfnt_off000258a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x258A1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000270b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x270B8 10916 bytes
SHA-256: b6c17585e075a78b2864b23ebf2e82cdfcc72cdfb833b61d89db62660c86059f

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