Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e8b67717a31dac4…

MALICIOUS

PDF

44.3 KB Created: 2021-06-03 07:31:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3cdbffe25e309acf4938e60b193f7453 SHA-1: 4de7a5abbb6463031e6055a66486ac271d86cf59 SHA-256: 9e8b67717a31dac41e83cc016d06eabd41cf1481b2633356914b660f5fbccb16
82 Risk Score

Malware Insights

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

The PDF document contains multiple links that lure users with promises of game hacks, specifically for Coin Master. These links redirect to external websites, such as 'netcdn.online', which are likely intended to host further malicious content or exploit kits. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/406889139/coin-master-free-gifts-game-hack PDF link annotation
    • http://www.perpus.stfm.ac.id/repository/hack-to-send-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/win-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-coin-spin_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/safe-hack-for-coin-master-android_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/robux-apk_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-private-server-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/claimrobux-net_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/earn-robux-online_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-get-free-robux-no-verification_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
stream_004_off000051af.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51AF 24112 bytes
SHA-256: b45c6cf2fec2a4e22002ec305f8c7c8ce8335ff46d9fc8a6d690efd25e4f1be1
font_01_sfnt_off00008869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8869 19040 bytes
SHA-256: 5373813167103ed9c81c154b67a7c2f06f59ea56b0d3cb64e508979208ee959c

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