Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa98ead079b6b9a…

MALICIOUS

PDF

83.9 KB Created: 2021-09-19 06:35:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d391f7dccf52b8af5a737a25d34945fa SHA-1: 445bb4fcbd7d1d075facdb38d95d992a9f9e51ad SHA-256: 6fa98ead079b6b9a39c0d786511e4cd34e240dc67fc1cbd9e795d96c0dbf9225
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to various domains, many of which are identified as part of a link farm on disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://cructi.ru/uplcv?utm_term=spooks+season+4+episode+9 PDF link annotation
    • http://fantasymusic.it/userfiles/files/duvufegodujozepumo.pdfIn PDF document text
    • http://mothertheresapublicschool.com/userfiles/file/36479395021.pdfIn PDF document text
    • http://xn----otbbfbbknchz.xn--p1ai/sadm_files/nivunijokomusuluzafepum.pdfIn PDF document text
    • http://househouse.it/userfiles/files/rifutofatofu.pdfIn PDF document text
    • http://www.trisad.kz/ckfinder/userfiles/files/81618129923.pdfIn PDF document text
    • http://roomyab.ir/basefile/roomyabir/files/43436818102.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/zumujomaradel.pdfIn PDF document text
    • http://5mal4.de/moneyvidya/web/images/userfiles/file/xarubivalanuwepabafeto.pdfIn PDF document text
    • http://pes.edu.mn/ckfinder/userfiles/files/61154595085.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/c04595014c8d62eef542c8ac3fd26008/17246710671.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/buterelukolesetekixeg.pdfIn PDF document text
    • http://www.hzkontejnery.cz/ckfinder/userfiles/files/noduw.pdfIn PDF document text
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/61746017413.pdfIn PDF document text
    • http://apismorava.eu/docs/jaderisapuvesoxavuliwad.pdfIn PDF document text
    • http://bishnutoursandtravels.in/userfiles/file/50380380187.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161355e7fd0826---kerojeviru.pdfIn PDF document text
    • http://needychild.org/ckfinder/userfiles/files/surapisagisibaj.pdfIn PDF document text
    • https://lienlacanien.com/img_pages/file/butod.pdfIn PDF document text
    • http://kenhuffbuilders.com/userfiles/file/67048056921.pdfIn PDF document text
    • http://211.129.1.225/system/ckfinder/userfiles/files/zafizid.pdfPDF link annotation
    • https://mmszke.hu/files/file/podewefibi.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/gibixetutaluwemova.pdfIn PDF document text
    • http://gesundezellen.com/neu/userfiles/file/75173525627.pdfIn PDF document text
    • http://evergladesharvesting.com/ckfinder/userfiles/files/31532315560.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_off0000e3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCB 10556 bytes
SHA-256: e749f794e037cb4d486bb661bcac4323dea348980e31d446e5f8f9a0d3e91ed5
font_02_sfnt_off000113fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113FB 17652 bytes
SHA-256: 7e4debd6bb6f2ad813c3890c838d68e5c57e7efdf923b4b36effdc51d03a1f1c