Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5fd2e698b7847f1…

MALICIOUS

PDF

69.7 KB Created: 2021-09-25 00:22:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 80cc827211ada8236e039fc3bde59a73 SHA-1: 33f8c861497c4088df6640ef5509c3a382525640 SHA-256: e5fd2e698b7847f19429da17c11743a52c9c914ab6f03dabcc976e89fce863f2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and appear to be part of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and the link farm heuristic suggest the primary goal is to redirect users to potentially harmful content.

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://smidgel.ru/uplcv?utm_term=stream+snyder+cut+justice+league PDF link annotation
    • http://hermanosgolbano.com/admin/fckeditor/editor/filemanager/connectors/phpfile/29590341377.pdfIn PDF document text
    • https://inprovitpuertorico.com/ckfinder/userfiles/files/sofuwiratikekufamimi.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/35ve7s6ju77gvka0hs09sku6pd/motosulavek.pdfIn PDF document text
    • http://xn----itbbfrdrdbd4bgy6gi.xn--p1ai/webroot/files/files/87854773687.pdfIn PDF document text
    • http://depcip.com/app/views/panel/ckfinder/userfiles/files/88103734017.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/tutawog.pdfIn PDF document text
    • http://tk-weld.com/images/library/File/45747789662.pdfIn PDF document text
    • http://ok-poland.com/userfiles/file/pojowudimadeta.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/98610839380.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/74238813703.pdfIn PDF document text
    • http://podushka.by/files/files/11008925692.pdfIn PDF document text
    • http://surtek.biz/image/files/20150409_084725.pdfIn PDF document text
    • http://sonhanint.com/uploadpic/sun/files/202109040021579322.pdfIn PDF document text
    • http://xn--80aafkatcapceshpicpg3h.xn--p1ai/pict/file/zavaxozo.pdfIn PDF document text
    • http://2478.ru/admin/ckfinder/userfiles/files/70406903490.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/banazepuz.pdfIn PDF document text
    • https://berettyotv.hu/userfiles/files/juvixifadofoki.pdfIn PDF document text
    • http://sb-78.ru/files/file/19227758973.pdfIn PDF document text
    • https://mgs-on-track.com/app/webroot/userfiles/file/40862043897.pdfIn PDF document text
    • http://industrialsupplies.pk/userfiles/files/kulalefisewamex.pdfIn PDF document text
    • http://polipack.ru/content/file/najusipof.pdfIn PDF document text
    • http://cck-brno.cz/ckfinder/userfiles/files/povegebojezezixujebixixiw.pdfIn PDF document text
    • http://leprofit.ee/cmsfile/contentfiles/sunezo.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_off0000af43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF43 16040 bytes
SHA-256: db020b18fd54c4fc0114b592e6c0b1f964fc9054e0055f68122881ca54d067f2
font_01_sfnt_off0000d7eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF002 11012 bytes
SHA-256: fffe0ef0710c9d528a00cb5cc60b7a91efddbcc49ef0ac37c41b1b7df3a8279f

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