Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2fda00b28f99df0…

MALICIOUS

PDF

34.4 KB Created: 2021-06-20 03:42:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0f8433d99be0d3d3640d759ebc361c82 SHA-1: 27b22d696b9cb391a9216507f23092991b0ae2c5 SHA-256: b2fda00b28f99df01ca4955f8ea55a420c1fadab06d51be48624a8ab0f031886
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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
  • 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://netcdn.co/app/431946152/free-parking-in-back-id-roblox-game-hack PDF link annotation
    • http://repository.unla.ac.id/repository/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-cheat-apk-free-download_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-we_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-free-gamepasses-on-roblox-2021-october_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/belly-button-roblox-free_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/tiktok-free-use_GM835599320.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-roblox-pant-templates_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-no-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-the-future-cheat-engine_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/mechanique-car-simulator-hack-free-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/tiktok-free-like-and-views_GM835599320.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/hacks-for-assassin-roblox-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED1 22400 bytes
SHA-256: a4901bdae7b84ab2e1d21f5d3fcb667f0be7bf5cc04356482ebf5162f92f9e08
font_01_sfnt_off000060d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D6 19268 bytes
SHA-256: 8fbb3568348f6dd42c74a8cab52d95213e1358c7e1336593ed34782e8cda02d7

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