Malicious PDF — malware analysis report

Static analysis result for SHA-256 64017aef7c1c00c8…

MALICIOUS

PDF

45.3 KB Created: 2021-06-03 13:53:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5c385b2db8551a7f9978eb06fdc2e211 SHA-1: 310b229370d8d96aca688605b2a9909d1f39efb1 SHA-256: 64017aef7c1c00c8c08c3dc07769839dfa19adb0943f527f3ea22fcd14499d69
142 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are structured as SEO-optimized links for game hacks and cheats, indicating a lure for users to download potentially malicious files. The ML classifier strongly flagged this PDF as malicious, and the presence of a 'password-protected archive' lure suggests an attempt to bypass security scanning. The document body, though heavily obfuscated, contains references to game hacks and URLs that align with this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/www-free-robux-game-hack
    • http://library.yamasi.ac.id/repository/coin-master-hack-tool-pc-download_GM406889139.pdf
    • http://library.yamasi.ac.id//repository/coin-master-free-spins-daily-link-updated_GM406889139.pdf
    • http://library.yamasi.ac.id//repository/coin-master-cheat-engine-hack_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/how-to-download-minecraft-for-free-on-pc_GM479516143.pdf
    • http://library.yamasi.ac.id/repository/minecraft-for-ipad-free_GM479516143.pdf
    • http://library.yamasi.ac.id/repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdf
    • http://library.yamasi.ac.id//repository/free-tiktok-followers-500_GM835599320.pdf
    • http://library.yamasi.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/minecraft-life-hacks_GM479516143.pdf
    • http://library.yamasi.ac.id//repository/hack-coin-master-without-verification_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/get-robux_GM431946152.pdf
    • http://library.yamasi.ac.id/repository/united-gaming-net-coin-master-hack_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdf
    • http://library.yamasi.ac.id//repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdf
    • http://library.yamasi.ac.id//repository/coin-master-hack-online_GM406889139.pdf
    • http://library.yamasi.ac.id/repository/is-uc-pubg_GM1330123889.pdf
    • http://library.yamasi.ac.id/repository/roblox-hack-client_GM431946152.pdf
    • http://library.yamasi.ac.id//repository/1x1x1x1-roblox-id_GM431946152.pdf
    • http://library.yamasi.ac.id/repository/coin-master-free-cards-link_GM406889139.pdf
    • http://library.yamasi.ac.id//repository/free-spins-from-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051fc.bin
cd49fcbd3ba59b35632b995e08e0ccab7a69efafb6ae68186540ed78aa2639a4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51FC 26472 bytes
font_01_sfnt_off00008e61.bin
3afa3067d1f3c9d8d4e5028784d7d2a7352a3b977a914758f486701e4d265e0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E61 18376 bytes

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