Malicious PDF — malware analysis report

Static analysis result for SHA-256 d63252afcdb5c01a…

MALICIOUS

PDF

68.1 KB Created: 2021-09-30 19:51:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 6300d084078ebaddf7310c7f470a68d2 SHA-1: 80dcd47b3501e44953c796c39ffe9d712f5d9448 SHA-256: d63252afcdb5c01a82d2426388c04edcd542b98f91a2271a21426441af9a7a2b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript and a large number of external links, many of which point to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or redirecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://europacreativaeuskadi.eu/files/galeria/files/zumalenunixox.pdf In PDF document text
    • https://yesilkoyluleriz.biz/resimler/files/rivemabiri.pdfIn PDF document text
    • http://dija.lv/public/userfiles/file/gisutumofinive.pdfIn PDF document text
    • http://cmuniontravel.com/userfiles/file/68269510534.pdfIn PDF document text
    • http://theheavent.com/userfiles/files/xozube.pdfIn PDF document text
    • http://markjfox.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/37388917270.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/92983604621.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/1021373546.pdfIn PDF document text
    • http://atel-j.nl/uploads/files/6395994496.pdfIn PDF document text
    • http://jamesandsons.ca/userfiles/file/jafunorufat.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16141f72239e6a---32693665086.pdfIn PDF document text
    • https://nacituran.com/userfiles/file/latew.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16148125853373---8656992343.pdfIn PDF document text
    • http://ciaomamma.hu/editor_up/39927950269.pdfIn PDF document text
    • http://jjteriyaki.iorderfoods.com/uploads/files/14377981289.pdfIn PDF document text
    • https://birsamundapark.in/userfiles/files/90454435382.pdfIn PDF document text
    • https://markyatirim.com/resimler/files/fewojovudid.pdfIn PDF document text
    • https://aqua2go.pl/galeria/file/76293903825.pdfIn PDF document text
    • http://tele-fonika.pl/upload/file/83774721660.pdfIn PDF document text
    • http://jamxmpharmatech.com/upload/files/vozebezavaza.pdfIn PDF document text
    • https://bmw-zona.ru/uploads/file/kozoxufowoge.pdfIn PDF document text
    • http://mundori.com/js/ckfinder/userfiles/files/resibuvok.pdfIn PDF document text
    • http://vning.net/filespath/files/20210930121930.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=free+codes+on+fortnitePDF 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_off0000ad2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC542 10236 bytes
SHA-256: 972aaa5bef785af0d20c646c9b8fbd0cf16e33757f95cc21b6af5393cba28a5a
font_02_sfnt_off0000dc54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC54 15320 bytes
SHA-256: 811facfef63b89fb33f1374b5e578b46c9a7d11398e041bf2b1335743ea202e9