Malicious PDF — malware analysis report

Static analysis result for SHA-256 cea60ba949e10f4b…

MALICIOUS

PDF

85.0 KB Created: 2021-09-12 17:04:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 3b3bb93214c57052b2f486ffd33943bc SHA-1: 57ae81841a463a33be91061a90034fbb46e031cd SHA-256: cea60ba949e10f4b833b02de2f86b9d576a9292a57496ba919fae0f0b5f18b5b
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one heuristic specifically identifying it as a link farm designed for redirection. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests the document's purpose is to trick users into believing there are new payment instructions, a common tactic in business email compromise attacks. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4c0f484c4---fumonazagikoxidosisekobuw.pdf In PDF document text
    • http://merlegdoktor.hu/tmp/63348035455.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/ninawebojetodugavovujevim.pdfIn PDF document text
    • https://zenit-npk.ru/files/file/46684553249.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/53980745526.pdfIn PDF document text
    • http://globalfeedindustry.com/upload/files/nazeduz.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/fc8914973014c4e78eb3d0e7148192a7/9968894766.pdfIn PDF document text
    • https://sportsslife.net/upload/ckfinder/files/xukubaxajanurodixuvoxamoj.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/xuzire.pdfIn PDF document text
    • http://archpiudue.com/userfiles/files/76596689181.pdfIn PDF document text
    • http://ossokahve.com/upload/file/pepimonavijopisag.pdfIn PDF document text
    • http://clinicaveterinariacene.com/userfiles/files/76814234380.pdfIn PDF document text
    • http://mediaworld.pro/ckfinder/userfiles/files/wadoxugemevinivo.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///gixixal.pdfIn PDF document text
    • https://best-of-geldanlagen.de/userfiles/file/tokukidajekatog.pdfIn PDF document text
    • https://www.pharmawell.eu/ckfinder/userfiles/files/redodebafejigifopijevum.pdfIn PDF document text
    • http://medianet2000.net/amm_prod/image_news_popup/file/tulezinuj.pdfIn PDF document text
    • https://rumusjitu.com/contents/files/xixubimosis.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/ragafaxuposifeke.pdfIn PDF document text
    • https://tattica.byespresso.com/app/webroot/files/upload/files/73036808271.pdfIn PDF document text
    • https://jhservice.net/imagenes/galeria/files/60197790707.pdfIn PDF document text
    • http://evolution-dev.com/file_media/file_image/file/20287567916.pdfIn PDF document text
    • http://nanopena.cz/upload/file/zixonubebitamirutunemoma.pdfIn PDF document text
    • http://rosabaum.de/web/editor/files/poxekesopimuvudepuv.pdfIn PDF document text
    • http://fsnmmaterials.com/UPFILE/userfiles/files/42608168550.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+transfer+new+android+phonePDF 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_off0000e7e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF2 17768 bytes
SHA-256: f91815b5f96a60be142e8008f2a6b70dd9da4f4f827b3fc9e9f8372799691620
font_02_sfnt_off00012e33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E33 10628 bytes
SHA-256: db1f7b7f42e85e3f54472cd080841f192d35c2ae1f9d35f5c5329bc872a885ca