Malicious PDF — malware analysis report

Static analysis result for SHA-256 d242de1499c792dd…

MALICIOUS

PDF

82.7 KB Created: 2021-09-24 05:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2233fd0439c904aac8ac9466c3dba787 SHA-1: 3879a1647b321ee43c6c077dfa3507f34bbc3067 SHA-256: d242de1499c792dddae9de62fae8dcf833206ce8351417768f21cec4284c0720
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 configured as link farms. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates these links are likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://crysiq.ru/uplcv?utm_term=voloco+premium+mod+apk PDF link annotation
    • http://hajnysport.cz/FCK_userfiles/file/tejebilitabajikubi.pdfIn PDF document text
    • http://agriturismolionsfarm.it/userfiles/files/fekefegepo.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161422d5f51812---lamisedez.pdfIn PDF document text
    • http://djapm.com/userfiles/file/66530052632.pdfIn PDF document text
    • https://hearing-outlet.com/uploads/files/202109160459206714.pdfIn PDF document text
    • https://mimpisiluman.com/contents/files/kexekapinesazozixutolamuk.pdfIn PDF document text
    • http://aloeverajuice.cz/files/file/sisebezabirukeza.pdfIn PDF document text
    • http://toszegisuli.hu/userfiles/file/numikewafulanavifapaf.pdfIn PDF document text
    • http://turskazka.ru/ckfinder/userfiles/files/meragiwasi.pdfIn PDF document text
    • https://hoangphatdanang.com/uploads/image/files/wisunivanusemodedukep.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/94093939750.pdfIn PDF document text
    • http://studiosiciliani.eu/userfiles/files/xokitutafirup.pdfIn PDF document text
    • http://clainvest.pl/userfiles/file/zidufafup.pdfIn PDF document text
    • http://kronikarp.pl/ckfinder/userfiles/files/44728359606.pdfIn PDF document text
    • http://tauroconsulting.pl/userfiles/file/24915449191.pdfIn PDF document text
    • https://ciela13.leaddeehub.com/userfiles/files/sofuzibunubomaka.pdfIn PDF document text
    • https://nhatngudongkinh.phapluatvietnam.com/upload/ckupload/files/liwupigoso.pdfIn PDF document text
    • http://shippingengineering.com/files/ckeditorothers/26662062730.pdfIn PDF document text
    • http://lienming-rubber.com/uploads/files/202109100818354069.pdfIn PDF document text
    • https://festivaldelmaridaje.com/sgi_userfiles/userfiles/files/muvegulolefud.pdfIn PDF document text
    • http://www.truca-taoules.com/ckfinder/userfiles/files/tegugutimelopofuxavuta.pdfIn PDF document text
    • http://asr-net.ru/uploads/files/firemujunodunukafemed.pdfIn PDF document text
    • http://isotope3.pm-ural.com/uploads/files/63672658750.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc491f2ef9---xujeres.pdfIn PDF document text
    • http://innovad-ltd.com/userfiles/file/zerugitijoku.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_off0000df73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF785 17692 bytes
SHA-256: 718643fd46e7f4cf18503acbfd2ee3fbc6e2e11da70a25c4f4de3ffbfaf497c5
font_02_sfnt_off0001256a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1256A 10464 bytes
SHA-256: 0c942e9de2e7f8e3c5e23ca47a384ec8110262de13814df6446b241e7c34bba8