Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb74f264b2c8b12e…

MALICIOUS

PDF

84.2 KB Created: 2021-09-12 19:36:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5cac01de3e1f405e07cfec5bae853045 SHA-1: 476ad047ab6747b0f8f1883fcd6b6f52481a453e SHA-256: eb74f264b2c8b12e9f6e7584fd7693b35349afb70dc277d555a93626455ce467
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards it being used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://pistant.ru/uplcv?utm_term=aladdin+2019+putlocker PDF link annotation
    • http://gazdalkodjokosan.hu/img/userfiles/file/75007514278.pdfIn PDF document text
    • https://elger.cz/fckphotos/file/mujuxixilofe.pdfIn PDF document text
    • http://hockjoohin.com/admin/uploads/file/durexujokerovixodafovuku.pdfIn PDF document text
    • http://freeorden.com/media/file/43010433206.pdfIn PDF document text
    • http://arenabilardo.com/data/_files/tinededonewo.pdfIn PDF document text
    • https://rubfila.in/files/file/lulojefuxaxe.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/e587b67531a2474e8fc9303c03d3d302/gefigoxisunifiwofo.pdfIn PDF document text
    • http://karlsbach.de/userfiles/files/24178930046.pdfIn PDF document text
    • https://citytrafik.nu/images/file/wetunag.pdfIn PDF document text
    • http://p-jtech.com/userData/board/file/32802257942.pdfIn PDF document text
    • http://citra.cl/userfiles/file/44299918016.pdfIn PDF document text
    • https://intersensor.ro/v2011/Files/fck_upload/file/rejidufokafipa.pdfIn PDF document text
    • http://loscogliodifavignana.it/userfiles/files/pufimegamerapomelebe.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/jimutasadupuvodazex.pdfIn PDF document text
    • http://ginzaramen.us/uploads/files/nimotejitosuzubiwiw.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/151204421761328c52d457a.pdfIn PDF document text
    • https://vialivonica.eu/userfiles/files/ximesewevunoguxewonuruse.pdfIn PDF document text
    • https://produse-zilan.ro/files/nesaliropuso.pdfIn PDF document text
    • http://haustechnik-hagenauer.at/nogozaxiwani.pdfIn PDF document text
    • http://nexxosrealty.com/userfiles/files/80494504513.pdfIn PDF document text
    • https://innotek.vn/uploads/news_file/beganu.pdfIn PDF document text
    • http://casinodanmarkjackpot.dk/userfiles/file/mugozozaxexutuvas.pdfIn PDF document text
    • http://gooselatex.com/userfiles/file/73554574614.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/6117696542.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_off0000df7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7E 10976 bytes
SHA-256: 2abf7c0b0f867e21da1e9801edf8d03f8a6634b2ee70b7b329e4b04913df2786
font_01_sfnt_off0000f91b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF91B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001112d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1112D 19476 bytes
SHA-256: c658d99346b5e71cfc4a5ad05d6e6219b7f63aada769b9f163c419d0621b8a82

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