Malicious PDF — malware analysis report

Static analysis result for SHA-256 76aaf4b80790f6d9…

MALICIOUS

PDF

34.3 KB Created: 2021-06-20 21:32:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9dab336e30da81ec1db2ee56c5195015 SHA-1: 17784827c92da43c89c4ca4cbc143567a2ff60b4 SHA-256: 76aaf4b80790f6d9efa68c9b265eb8e525ea6cdc2d1357eaa1567a6b602c62dd
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple lures related to game hacks and free currency, directing users to external URLs. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates a malicious intent to redirect users to potentially harmful content. The ML classifier also flagged this PDF as malicious with high confidence.

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/robux-no-human-verification-game-hack PDF link annotation
    • https://vieclamjapan.com/upload/files/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/do-roblox-admins-get-free-robux_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/how-to-farm-money-in-boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/working-free-robux-obbys_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/robux-place-rewards_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/coin-master-key-free-spin_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/minecraft-images-free_GM479516143.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/pokemon-go-free-ultra-box_GM1094591345.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-robux-quiz_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_off00002e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E42 22544 bytes
SHA-256: 44038947307f42e68ed16bf599bf1fd67a8b73f3866e4010b9150a9f95f37785
font_01_sfnt_off00006080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6080 19168 bytes
SHA-256: f84039c9361d4f9d97108524e2d84d99e94a3822b4246e645743a6f7b891171e

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