Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcdb53076332f935…

MALICIOUS

PDF

46.1 KB Created: 2021-06-03 07:50:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a31ba7071fe680cf3b675ef882fb2616 SHA-1: af08d1ad87ced22182fc1743c3717894a58c4419 SHA-256: fcdb53076332f935023eb5b8481b82b5395c0d9a8e9fe987578d72d5c3aa4cf8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link that redirects to a website offering 'free game hacks' for Roblox, a common lure for malicious content. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a potentially harmful site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.online/app/431946152/roblox-skins-boy-free-game-hack PDF link annotation
    • http://lib.icbc-indonesia.org/repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/tiktok-free-money_GM835599320.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/pokemon-go-free-incense-2021_GM1094591345.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/pokemon-go-free-box_GM1094591345.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-hack-root_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/free-promo-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-free-spins-link-download-ios_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/minecraft-creative-mode-free_GM479516143.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
stream_004_off000053b2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53B2 27268 bytes
SHA-256: 1b36055cd8f298e1084b82ea94c7637910dabfb84425c049debec5e33d890461
font_01_sfnt_off00009188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9188 18420 bytes
SHA-256: f34de68c913d1c931e579594a611635df95b6f402bf6c6d3ef5f8f4a3ceebe71

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