Malicious PDF — malware analysis report

Static analysis result for SHA-256 b98dfdb3d70532fa…

MALICIOUS

PDF

76.4 KB Created: 2021-09-12 15:02:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d9c939cce622700537c551f368b28553 SHA-1: ace5c48bdf3d93ec64917cb6cbfccd78d6db87d3 SHA-256: b98dfdb3d70532fa616069cb4fb3ee3f8a4ac4431561b4243718495bef1184e9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the presence of external URIs and the overall detection profile indicate a malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/9e04a123407673cae9886c1ffe27d84e/ziluvofigokumisax.pdf In PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/biwaga.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/2182682371.pdfIn PDF document text
    • http://sm.ac.th/ckfinder/userfiles/files/tixigujara.pdfIn PDF document text
    • http://topliving.sk/userfiles/file/61007661803.pdfIn PDF document text
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/56904815081.pdfIn PDF document text
    • https://equipelec.fr/ckfinder/userfiles/files/42164588384.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/66055292275.pdfIn PDF document text
    • http://kondicionery-fryazino.ru/upload_picture/file/93896474030.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/76916933795.pdfIn PDF document text
    • http://gma.ge/admin/ckeditor/ckfinder/userfiles/files/32858058835.pdfIn PDF document text
    • http://whuntex.info/userfiles/file/lufikupanifuwuwapewe.pdfIn PDF document text
    • http://caerulumpharma.com/upload/files/mufogijesejuweronosava.pdfIn PDF document text
    • http://modernplating.com/userfiles/file/51555406994.pdfIn PDF document text
    • http://mazraeir.com/images/upload/files/68477916942.pdfIn PDF document text
    • https://jackinthegymtpe.com/uploads/files/202109050957422338.pdfIn PDF document text
    • http://cowmoo.org/ckfinder/userfiles/files/wuwafawifafepawafak.pdfIn PDF document text
    • http://alacarte-husum.de/userfiles/file/36402430927.pdfIn PDF document text
    • https://tutorlookup.com/ckeditor/ckfinder/userfiles/files/labavosubapig.pdfIn PDF document text
    • http://magyaringatlanadatbazis.hu/dev/_user/file/viseron.pdfIn PDF document text
    • http://lokalizacja-gps.pl/userfiles/file/75146253119.pdfIn PDF document text
    • http://thaisomboonautopart.com/userfiles/files/31284591598.pdfIn PDF document text
    • https://balticstroy.com/uploads/files/rabijozetavefawav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=among+us+live+wallpaper+makerPDF link annotation
    • 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_off0000c71f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC71F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF31 16956 bytes
SHA-256: b6288078d2988f654b3fd2f00d5572e4196dc27e3bc6dd96b5e6c15215ccf6e1
font_02_sfnt_off00010b10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B10 10824 bytes
SHA-256: 3a414931b593e01761463bf92227df4628e7eed14ecad6750641dd0e4d686f55

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