Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ecee1a45fed1e88…

MALICIOUS

PDF

90.5 KB Created: 2021-09-10 09:32:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: af52417a4393b149d5a9f04e03e14fee SHA-1: 6bd62e6546c00f5a2f8a39cd0d1e9ad6f46e72ea SHA-256: 7ecee1a45fed1e8885217ca5ef320788bcffff51c7593b1f49af590dc958782f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to potentially malicious domains, and is flagged by ML classifiers and ClamAV as a phishing trojan. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm, suggesting a phishing or spamming operation. While no scripts were explicitly extracted, the nature of the embedded URLs and the ML detection strongly suggest a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://inarsindbari.org/uploads/kinomasatukepa.pdf In PDF document text
    • https://unitytradecapital.com/ckfinder/userfiles/files/motijanezetozuxi.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/59661920843.pdfIn PDF document text
    • https://estatecambodia.com/htdocs/cljr/data/files/26475293118.pdfIn PDF document text
    • http://zssadkowice.pl/pliki/ludiladaz.pdfIn PDF document text
    • http://www.keizerco.nl/userFiles/file/rojubezixibusik.pdfIn PDF document text
    • http://gptools.net/userfiles/file/22337870617.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/43193618597.pdfIn PDF document text
    • http://kimkhimientrung.com/uploads/image/files/74276031013.pdfIn PDF document text
    • http://net-work.cz/data/file/naxufozarikulubafi.pdfIn PDF document text
    • http://turbotechnik24.de/userfiles/file/54745036762.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/beb161ca567ce00416fea9fe9d5a9d8c/3217762925.pdfIn PDF document text
    • https://hijaustabilo.com/contents/files/13484192376.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613992cce06da---nitudotetafafe.pdfIn PDF document text
    • https://www.mppoa.cloudlinesystems.com/assets/ckfinder/userfiles/files/4816765399.pdfIn PDF document text
    • http://kiddeefire.com/media/userfiles/files/rorilefukubuxojavu.pdfIn PDF document text
    • https://waxparadise.pl/userfiles/file/91291402875.pdfIn PDF document text
    • https://kligi.viart.lt/ckfinder/userfiles/files/38237936000.pdfIn PDF document text
    • https://ddnepal.com/assets/userfiles/files/16772323988.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/gegedopirilu.pdfIn PDF document text
    • http://grafiport.com/userfiles/file/90876362906.pdfIn PDF document text
    • http://cargologicru.com/sadm_files/notafapaxanamugajule.pdfIn PDF document text
    • http://fohow77.ru/upload/file/bibulofolirozotukigot.pdfIn PDF document text
    • https://moulindelarroque.com/userfiles/file/62305950887.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=evaluation+research+design+pdfPDF 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_off0000fa2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2E 18772 bytes
SHA-256: c6f2bc10797ac70b4cbed733904c5a53d5d59a80c50bc6e2658b5134d103071c
font_01_sfnt_off00012adf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ADF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000142f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142F6 11048 bytes
SHA-256: df4d650cb305e4a362bf6dcef13828131de5e6f1f6870c78c8e7cac1a0b6b4ae

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