Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e59864dde098cf3…

MALICIOUS

PDF

73.6 KB Created: 2021-09-12 22:03:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 497cd9cdd0423e1c83b5f16ef2e760ef SHA-1: ff5530fa3bb353685cfc3a5298c97164f293dc3c SHA-256: 1e59864dde098cf33300a2cc141f061adee7a52d7d8322c8f640c5f7251a0cea
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external URIs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly indicate an attempt to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://pixomot.ru/uplcv?utm_term=pokemon+masters+download+apk PDF link annotation
    • http://alemotta.com/resources/original/file/64167470636.pdfIn PDF document text
    • http://vladekoservis.ru/files/mazekaxururesewovajeledif.pdfIn PDF document text
    • http://teplo76.ru/uploads/file/bojujonijurumax.pdfIn PDF document text
    • http://bm-shower.com/userfiles/files/weziperad.pdfIn PDF document text
    • https://inprovitvenezuela.com/ckfinder/userfiles/files/dubewaxorinow.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/zesedizorizejurexob.pdfIn PDF document text
    • http://jandebruijn.com/uploadimages/files/62672634632.pdfIn PDF document text
    • https://inprovitbrasil.com/ckfinder/userfiles/files/73242755775.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161328b735862f---dekegus.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/85487336279.pdfIn PDF document text
    • http://cpils.com/userfiles/file/pukepunin.pdfIn PDF document text
    • http://szwygs.com/upload/40009048349.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/49907272636.pdfIn PDF document text
    • http://agro-partner.com/Image/files/nevisagi.pdfIn PDF document text
    • http://ominocoibaffi.it/userfiles/files/44491946608.pdfIn PDF document text
    • http://angelascanu.it/uploads/file/noduranewanada.pdfIn PDF document text
    • https://subarini.ro/mm/file/98136080463.pdfIn PDF document text
    • http://himalayakebab.irafbrothers.com/shipinc/userfiles/files/51096876131.pdfIn PDF document text
    • http://vitrine-prof.com/files/xajiwawajemol.pdfIn PDF document text
    • http://bargiel.com.pl/ckfinder/userfiles/files/xinataxixonib.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/161347b15c841f---jeduzesiwewujizuwo.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/ketivorodupuv.pdfIn PDF document text
    • http://swhos.com/upload/files/20854067208.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/nopakibofogagalasasus.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_off0000b99a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB99A 17976 bytes
SHA-256: 6082b7e4234b19d4e95f1b50b651724622912534ef975ee56ed7c7bb7951f0a7
font_01_sfnt_off0000e826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE826 10640 bytes
SHA-256: 75a30e7c1ceb5e41e439ce0cd2699b4b15e581275b838fe388dc2eaebf67fa06
font_02_sfnt_off000100a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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