Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9dd0372a67b164a…

MALICIOUS

PDF

82.5 KB Created: 2021-09-14 07:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4910d11206652fe4302ef7be0ca083af SHA-1: cfda3051ecad9dada72b116f10dad58af4f4a0f0 SHA-256: e9dd0372a67b164abf01b5eab5ac4c0b717611789f816f9b1d59dee67ec251bd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a large number of links pointing to potentially disposable domains, suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the nature of the embedded links and the ML detection point towards an attack pattern involving redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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 http://madinagirls.com/easydo%20v2.00/files/uploads/xitiben.pdf In PDF document text
    • http://bhhangkhong.com/upload/images/files/duvawomesalogukugoze.pdfIn PDF document text
    • http://neurooperations.com/ckfinder/userfiles/files/68888118557.pdfIn PDF document text
    • https://h1t-url12shio-turbo.com/contents/files/jijubika.pdfIn PDF document text
    • https://rajatotogroup1.com/contents/files/65904906215.pdfIn PDF document text
    • https://pasarangroup1.com/contents/files/zefuwu.pdfIn PDF document text
    • http://boxethai38.com/upload/file/pijulemikodinujaxiremo.pdfIn PDF document text
    • http://canoeing.by/pics/files/kitebisawobi.pdfIn PDF document text
    • http://maryalo.com/userData/board/file/lokekiluvowuzuxagenegam.pdfIn PDF document text
    • http://precisao.net/files/files/21995067713.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/tukelapuwanuninesav.pdfIn PDF document text
    • http://areaengineeringsrl.eu/userfiles/files/46306692016.pdfIn PDF document text
    • http://www.fred-robin.com/ckfinder/userfiles/files/1594229116.pdfIn PDF document text
    • http://c-six.it/userfiles/files/jogunubozupurisubamo.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/csk54ueacgtnkiha4knior9o87/jexilakagisoxipesetabow.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/natobodogijawawom.pdfIn PDF document text
    • http://peak-experience-japan.com/images/blog/file/16834178886.pdfIn PDF document text
    • https://ms2gacor.com/contents/files/64312256276.pdfIn PDF document text
    • http://adas-muko.pl/photo/file/53141473207.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161401ab93682c---87475611360.pdfIn PDF document text
    • http://henzefashion.com/userfiles/file/juguluwonovawuguvazibe.pdfIn PDF document text
    • http://americandeliorder.com/uploads/files/pevofikubapivow.pdfIn PDF document text
    • https://petandpuppies.com/userfiles/file/3503115102.pdfIn PDF document text
    • http://agarimo.com/archivos/archivos/dosetamimezamefezowip.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/jawepozalopax.pdfIn PDF document text
    • https://tierlistei.ch/downloads/76073640938.pdfIn PDF document text
    • https://tidurmalam2.com/contents/files/6425699929.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=cheat+8+ball+pool+luluboxPDF 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_off0000df4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4B 17280 bytes
SHA-256: 268312071850ccac62f6e1cc1e98001223bef34d079a79ac84e7bb6ca1a956f3
font_01_sfnt_off00010c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C10 10468 bytes
SHA-256: 9220a5392b394882fce903ac5a9409f1753e4e6e8fb9cd4b9cb46105507d5b79
font_02_sfnt_off000123d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1