Malicious PDF — malware analysis report

Static analysis result for SHA-256 81a6d80b72f59642…

MALICIOUS

PDF

34.1 KB Created: 2021-06-18 01:57:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0682f599a377a5680e6ea5c9c0325aef SHA-1: 0b8d21e2322351f60754ebac1992da9a06a3a102 SHA-256: 81a6d80b72f596420f1c0b7aebfbaadddf5593cd4321087b49a7b9e709f304fa
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that redirect to sites promising game hacks and cheats, a common lure for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a 'game hack' redirect lure confirms a malicious intent to direct users to potentially harmful content. No scripts were extracted from this sample.

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/hacking-roblox-accounts-sites-game-hack PDF link annotation
    • https://pustaka.widyakartika.ac.id/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-card-hack_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/2021-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-hacked-smile_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-coin-spin_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-groups-on-roblox-to-own_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-its-free_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/gamekit-how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-spin-links-coin-master-october-30-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-apk-114-4_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/robux-generator-that-works_GM431946152.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_off00002dff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DFF 22592 bytes
SHA-256: 2f4ac209e1fd73767dec8bd2f3b74be675b5a6985e0e79f254928a6f7997819e
font_01_sfnt_off00006005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6005 19020 bytes
SHA-256: 2e2a8efe79b7ebd8bf3f7b92947c5aadd0edb2f1fb35c7f4f50fd093fc4d69d7

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