Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47af9b667e55104…

MALICIOUS

PDF

82.4 KB Created: 2021-09-18 14:53:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 659fcf22b0763e6d7b0a9a4e19dd63b8 SHA-1: 653bfcd16f6159f1520b7001c4cca36c7a196ebf SHA-256: f47af9b667e551047cf6c72f6f3103e5b59ddd7fd77b987e3122fa16067aa6d9
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as a phishing trojan. Heuristics indicate it uses a browser extension installation lure to trick users into compromising their systems. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://ajeah-intl.org/fck_image/file/88690402827.pdf In PDF document text
    • https://suacuacuontoanphat.com/upload/files/pusujuvoju.pdfIn PDF document text
    • http://santamariamikado.com/uploads/files/dalubekukoxaret.pdfIn PDF document text
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/losediri.pdfIn PDF document text
    • http://www.macrolepidoptera.hu/userfiles/files/77473661627.pdfIn PDF document text
    • https://magicdiscoradio.hu/userfiles/file/wevegeziwefesatoliwuxamov.pdfIn PDF document text
    • http://gnox.vn/upload/files/wigutipimimamebas.pdfIn PDF document text
    • http://bananamusic.tw/uploads/files/202109121058016014.pdfIn PDF document text
    • https://jungleflightchiangmai.jungle-flight.com/Uploads/files/monaweruzujixomupebiras.pdfIn PDF document text
    • http://inoxbienhoa.com/upload/files/papubefo.pdfIn PDF document text
    • http://slbreakingnews.com/ckfinder/userfiles/files/gorewik.pdfIn PDF document text
    • https://petikdaun.com/contents/files/sedapedofebin.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/54938813701.pdfIn PDF document text
    • https://koratspring.com/upload/file/seloguwowokiditidejitite.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/mekukunubidaripe.pdfIn PDF document text
    • http://xn--42-jlclgg6a3e.xn--p1ai/userfiles/file/xejero.pdfIn PDF document text
    • http://racecross.com/upload/edito_fckeditor/file/21023385611.pdfIn PDF document text
    • https://polresseluma.com/assets/ckfinder/core/connector/php/uploads/files/67170712826.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/36016676249.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/ziseze.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/gibum.pdfIn PDF document text
    • https://dalnoboy.com/data/filestorage/upload/files/44309397775.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/qlfucalqpc0p17vtv7le7p3s6q/wexojijajob.pdfIn PDF document text
    • http://ipublicity.cz/data/file/maxinovalenasezolazuradob.pdfIn PDF document text
    • http://okeefesreef.com/ckfinder/userfiles/files/lukonumulegibaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=dark+mode+on+android+phonePDF 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_off0000dcae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAE 10440 bytes
SHA-256: a63cdef92686e5ffbce7560b332110454688464c6898f38a55968317a95b8f64
font_01_sfnt_off0000f407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF407 18372 bytes
SHA-256: 93f0350cb0ad108db335caf3d63041e1bdb3c640ccb40b7ca78c9f08525fb6ac
font_02_sfnt_off000123d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1