Malicious PDF — malware analysis report

Static analysis result for SHA-256 d89c130a637eee31…

MALICIOUS

PDF

79.7 KB Created: 2021-09-19 02:38:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: e21040ba42226f3e9cb2367de9fd97ef SHA-1: 15ab9de82524288865b2fa87591302ac1d234653 SHA-256: d89c130a637eee3136f474b947e502ec0f1c42db3617ae37737a86ebed743426
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which are hosted on disposable domains and appear to form a link farm. The presence of a 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and a high ML score indicates a malicious intent to redirect users. While no scripts were directly extracted, the structure suggests a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://exosportsante.fr/ckfinder/userfiles/files/80177122772.pdf In PDF document text
    • http://komputerzagrosze.pl/userfiles/file/44131668265.pdfIn PDF document text
    • http://jtipartner.com/ckfinder/userfiles/files/45110532262.pdfIn PDF document text
    • https://mylin.in/ckeditor/ckfinder/userfiles/files/popikidigebomokenidomonox.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/wexiz.pdfIn PDF document text
    • http://superbarter.sk/media/file/19209749721.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/pujosevol.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kibujojomatigikixalemikod.pdfIn PDF document text
    • http://onlinecommerce.bg/uploads/pages/files/guxotavanafit.pdfIn PDF document text
    • http://carszana.com/image/upload/File/27305785995.pdfIn PDF document text
    • http://tubemakingmachine.com/uploadfile/files/fozubimemar.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/66e99e5b99f40cabb614e79115bc5af6/12587849788.pdfIn PDF document text
    • http://keitbg.com/images/files/dulidadi.pdfIn PDF document text
    • http://golden-candies.ru/webroot/files/files/34514665850.pdfIn PDF document text
    • http://daivupaint.com/img-chamthi/files/vurogexovifatupobefujosuw.pdfIn PDF document text
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/45532348464.pdfIn PDF document text
    • https://termofriz.rs/files/gagofeguziwix.pdfIn PDF document text
    • http://valkexclusief.reviews/app/webroot/files/userfiles/files/lufetag.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/82744676645.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=alien+force+war+earth+protector+game+downloadPDF link annotation
    • https://mediaget.com/userfiles/files/degilidumo.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_off0000d143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD143 18096 bytes
SHA-256: 9be60c970c0d0b1b881a7fa12cb07ae14eb2b5e5a5405d8063e51709590e3339
font_01_sfnt_off00010023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10023 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001183a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1183A 10964 bytes
SHA-256: fce7d17c13e7c83685a20755b7f4deb0f7fc0e5d393ce6c49f4cf444849f8b5c

Open this report in the interactive analyzer, or submit your own file for analysis.