Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cb2cda3ff6d7ce4…

MALICIOUS

PDF

70.0 KB Created: 2021-09-25 01:38:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8042f5870bca8ad0fe1b808a473d61c0 SHA-1: 04f7576dbd83e8596747e8a24a6f857390458d96 SHA-256: 0cb2cda3ff6d7ce490fa3d946a3c19930f3de6132e27311465221eb5ac1bb15b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to a link farm, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. The ML classifier and ClamAV also flagged this file as malicious, suggesting it is part of a phishing or malware distribution campaign. While no scripts were explicitly extracted, the nature of the embedded URLs and the heuristics strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resulgame.com/calisma2/files/uploads/84510831507.pdf In PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/12662347795.pdfIn PDF document text
    • https://doosradashak.in/ci/userfiles/files/nuguwanegavopo.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/nelewumofe.pdfIn PDF document text
    • https://ceramicasvillaflor.cl/UserFiles/File/65029430574.pdfIn PDF document text
    • http://montex.pro/uploads/userfiles/file/durajabevuzovokon.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f1ldcmsuan43ssqrtcacarbea7/sonojaneko.pdfIn PDF document text
    • https://coil.hk/upload/files/71590141291.pdfIn PDF document text
    • http://burbank.kopanramen.com/uploads/files/jiwelimatobitaxebul.pdfIn PDF document text
    • https://www.truckersplantparts.co.uk/ckfinder/userfiles/files/lamusukezoraz.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/pasikaz.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/fekavid.pdfIn PDF document text
    • http://tubemakingmachine.com/uploadfile/files/73578149167.pdfIn PDF document text
    • https://apatity.verlauf-ekb.ru/admin/ckfinder/userfiles/files/xesilodukunavenev.pdfIn PDF document text
    • http://pokebarslo.com/uploads/files/sitexaxe.pdfIn PDF document text
    • http://gjbbang.com/userData/board/file/65145592159.pdfIn PDF document text
    • https://igescanada.com/ckfinder/userfiles/files/mozizifogudemibir.pdfIn PDF document text
    • https://newsru.md/upload/userfiles/files/63477781173.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/33c9fce130d834de05124ee5fa93ca84/numadu.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/93901940898.pdfIn PDF document text
    • http://ssanadia.in/userfiles/file/86481511642.pdfIn PDF document text
    • http://ministryofrum.com/memlogos/file/16246873140.pdfIn PDF document text
    • http://protrialse.eu/files/files/811165988.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=watch+justice+league+snyder+freePDF 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_off0000afe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7FA 16328 bytes
SHA-256: 86d0e2307d4726a5834d9aa42b8f1f373c7a167a739c9010da269a1f379907d0
font_02_sfnt_off0000f16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16D 10972 bytes
SHA-256: 6aec117942002c777679907916469f6b92f72b54027c9b24f6f5060ce9cb888a

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