Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d9f6ed45c435230…

MALICIOUS

PDF

89.4 KB Created: 2021-09-11 21:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5f97563eba52ccb53ba69bddaeac3afb SHA-1: a7d9416fcc53cd2dc58491f954bba3a53e1dddc8 SHA-256: 2d9f6ed45c435230afdf04624fc6f16678398c292131d7d397e5f6467a45c428
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous embedded URLs, many of which point to disposable or suspicious domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting a link farm designed to redirect users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a phishing or malware distribution intent. No scripts were extracted, but the primary attack pattern involves directing users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://archism.ru/uplcv?utm_term=nba+2k20+codes+myteam PDF link annotation
    • https://tavfelugyelet.megujuloenergiapark.hu/admin/ckfinder/userfiles/files/bifukozatigamab.pdfIn PDF document text
    • http://studiotecnicomancini.eu/userfiles/files/neziniwoxowebuv.pdfIn PDF document text
    • https://serka.com/serka/upload/files/nokadedevivefudivenud.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/defawawi.pdfIn PDF document text
    • https://horgaszvelem.elelmiszer-hazhozszallitas.hu/ckfinder/userfiles/files/62140171841.pdfIn PDF document text
    • http://premiumdrinks.eu/userfiles/raguni.pdfIn PDF document text
    • http://slr-eyewear.com/slr/userfiles/20210903050721.pdfIn PDF document text
    • https://istocdukkan.com/userfiles/files/furuz.pdfIn PDF document text
    • http://oppedisanorobertosrl.com/userfiles/files/zedagotos.pdfIn PDF document text
    • http://htwy.com/upload/file/84623707470.pdfIn PDF document text
    • http://kuwaited.com/cote_dor_import/admin/ckfinder/userfiles/files/4231090603.pdfIn PDF document text
    • http://himalayakebab.irafbrothers.com/shipinc/userfiles/files/tevatamibitifafu.pdfIn PDF document text
    • https://alperbehang.nl/userfiles/file/tugiw.pdfIn PDF document text
    • http://mentaplywood.com/images_upload/files/fewadem.pdfIn PDF document text
    • https://rhuyscampingcar.fr/images/files/385298949.pdfIn PDF document text
    • https://onutglen.com/caningest/images/file/26968635283.pdfIn PDF document text
    • http://naturalfurnish.com/userfiles/file/vikulukevi.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/21023127273.pdfIn PDF document text
    • http://sdhmladavozice.cz/userfiles/file/fubepunemapa.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/93652643809.pdfIn PDF document text
    • http://clingac.es/d/files/padegogu.pdfIn PDF document text
    • https://spitalmoldovanoua.ro/ckfinder/userfiles/files/55238282844.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA16 18700 bytes
SHA-256: a92534afe1c6a5cc23b7205af2e0a84a010dc48a87f132e9275ea3cc88c8553d
font_01_sfnt_off00010adf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADF 18092 bytes
SHA-256: b58648c2ad8f15634face9e18c5f3acce527efdc9d3af1effb699878ebcbb053
font_02_sfnt_off0001272f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1272F 10756 bytes
SHA-256: b9994d41bec6c6baa2f4c1f26fa7defd8fc228eac24d17a8943475326672a8fd
font_03_sfnt_off00014026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14026 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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