Malicious PDF — malware analysis report

Static analysis result for SHA-256 bea73d4e75c56c51…

MALICIOUS

PDF

71.3 KB Created: 2021-09-27 21:23:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 807a2ef2fad1c7519722b8264b75d833 SHA-1: da469d4166b14bbf6fa7d8b526731aa872ca3878 SHA-256: bea73d4e75c56c517513666a563b5cb637bb7d3147bf6991d8a946b39b4fbe40
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure suggests it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://coretry.ru/uplcv?utm_term=pokemon+platinum+shiny+encounter+code PDF link annotation
    • http://ngor2-3.com/file_media/file_image/file/67145145065.pdfIn PDF document text
    • https://sieuthimaytinhcu.vn/upload/files/39751259938.pdfIn PDF document text
    • http://odontoflash.eu/userfiles/files/dorexebidubofolad.pdfIn PDF document text
    • http://allasclub.com/campannas/file/jemomugevepu.pdfIn PDF document text
    • https://e-ssuances.com/ckfinder/userfiles/files/71134723507.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/29138901743.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/e74eda9458acf34204427e32e7c00386/45128337241.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/gojojajas.pdfIn PDF document text
    • https://hanomanberjaya.com/contents/files/28501921126.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161343de65aca4---gorolozepijujusunujubosi.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/44939769292.pdfIn PDF document text
    • http://marketingnews.fr/images/file/denojedareju.pdfIn PDF document text
    • https://akonis.ch/userfiles/files/wokufuk.pdfIn PDF document text
    • http://gizmakina.com/depo/sayfaresim/file/numedapodukaseribopo.pdfIn PDF document text
    • https://ustunbilgisayar.com/userfiles/files/jofewiwazemazaloxiladi.pdfIn PDF document text
    • http://interroadholland.nl/userfiles/file/38871453722.pdfIn PDF document text
    • http://carrasvilla.es/uploads/files/28218083533.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/25157500024.pdfIn PDF document text
    • http://alfatreyd-mebel.ru/archive/images/file/2052348555.pdfIn PDF document text
    • https://mcdelandes.ca/uploads/file/jizulijotegiro.pdfIn PDF document text
    • http://qdsenfeng.com/data/files/13487809665.pdfIn PDF document text
    • http://adirondackseafood.com/ckfinder/userfiles/files/76237597177.pdfIn PDF document text
    • https://grup-rul.ro/printuri-fi/files/zapawupifupu.pdfIn PDF document text
    • https://wotfiles.com/ckfinder/userfiles/files/lizutigeregabisifiwuta.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_off0000afc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFC3 11088 bytes
SHA-256: c1e211d2263377a4f0546be9e0353bc2386423b51244b376adf0ec61463658f4
font_01_sfnt_off0000c974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC974 17696 bytes
SHA-256: 3e834f22873059514802560c0dc903b6d19e81a486da62012056c99b8b818537
font_02_sfnt_off0000f75e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF75E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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