Malicious PDF — malware analysis report

Static analysis result for SHA-256 c466432aa060d3e5…

MALICIOUS

PDF

84.6 KB Created: 2021-09-09 20:22:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 4afe58e425c9726452668e87bd6f4b5a SHA-1: 1fb4731507072801cccfd5277c6d67d59c00fdd6 SHA-256: c466432aa060d3e524ca72109241d72f455d0c7cc3396de0f21e50a2564a1030
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to external domains, indicative of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and extensive URL usage are common in malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://cructi.ru/uplcv?utm_term=best+android+games+right+now PDF link annotation
    • https://saptabangunmanunggal.com/indomobils/upload/file/76440217424.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/99910715737.pdfIn PDF document text
    • http://skipjackpoke.com/ckfinder/userfiles/files/23915683428.pdfIn PDF document text
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xorogekagakefakemirax.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/waxedemibewot.pdfIn PDF document text
    • http://canxetaianhduc.com/images/file/99414778985.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/wafasusu.pdfIn PDF document text
    • https://kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/71711253499.pdfIn PDF document text
    • https://endeligmandag.no/e-brev/data/div/xapamo.pdfIn PDF document text
    • https://snoman.mb.ca/ckfinder/userfiles/files/48130113144.pdfIn PDF document text
    • http://kxzyjy.com/CKEdit/upload/files/10380645110.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135f9db8aae2---jukilajimara.pdfIn PDF document text
    • http://boletos.luzservicos.com/ckfinder/userfiles/files/8695302719.pdfIn PDF document text
    • http://gaia-onlus.org/userfiles/file/pogabavoxefo.pdfIn PDF document text
    • http://noahmission.org/dataroom/file/63508829979.pdfIn PDF document text
    • http://www.fashiongale.ro/userfiles/files/19810000152.pdfIn PDF document text
    • http://zatexpress.com/upload/userfiles/files/22998493691.pdfIn PDF document text
    • http://oxigensupplies.com/shipinc/userfiles/files/lonuxigakukinegivuwewubaw.pdfIn PDF document text
    • http://alrehabourhome.com/userfiles/files/rekiratojibuvorowabem.pdfIn PDF document text
    • http://immobilier-valence-agen.com/userfiles/file/wejugipikikibeze.pdfIn PDF document text
    • https://csmgh.net/pevron/www/img/file/91917477915.pdfIn PDF document text
    • http://sun-green.be/ckfinder/userfiles/files/malogebufeposuzavol.pdfIn PDF document text
    • https://motty-etai-sharon.com/files/files/32791423064.pdfIn PDF document text
    • http://davidhammerstein.org/ckfinder/userfiles/files/pedugekugusop.pdfIn PDF document text
    • http://daydeothe.vn/rich_editor/file/lupojewabamupiregita.pdfIn PDF document text
    • http://otestmanager.org/club/data/userfiles/file/20210903090508.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_off0000e699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE699 17632 bytes
SHA-256: c5f334536bc670542f87cdf742a142e32c4b08870173f1387128f6e88a142070
font_01_sfnt_off00011429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11429 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C40 10788 bytes
SHA-256: b8310ec653f19af2c6843a52dc319deb26a8fd6aa56efa4a3616d14e77cb1706