Malicious PDF — malware analysis report

Static analysis result for SHA-256 c287f2376650e91b…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 11:07:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 222aa384aa9ad42e7e5f4e048195cfa3 SHA-1: d4f1ff5035aa0856141e2dec93f5e581e41ef5d7 SHA-256: c287f2376650e91b317b6538b475cb105465902c8703ad09cbfa14e9e418eea0
82 Risk Score

Malware Insights

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

The PDF document contains a high-confidence heuristic indicating it links to a game hack redirector, specifically targeting users interested in 'free Roblox outfits'. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the redirector URL, which likely leads to a site designed to trick users into downloading further malware or engaging in credential harvesting.

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.tw/app/431946152/best-free-roblox-outfits-game-hack PDF link annotation
    • http://lib.uho.ac.id/library/repository/how-to-make-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-mod-version-free-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/code-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-link-ios_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/como-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-app-ios-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-free-robux-no-survey-no-save-no-subscription_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/moonactive-free-spins-link_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/hack-coin-master-xyz_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_off00003007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3007 22300 bytes
SHA-256: 85b28d19e2e74514461464cbb18898bb0faed0a107ca76f50f1243ac86a34ff9
font_01_sfnt_off000061b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B0 19012 bytes
SHA-256: fd2be7b501cc1ddbfc061facd5d56eeae4294648e0a008f2ae7c9284085667e2

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