Malicious PDF — malware analysis report

Static analysis result for SHA-256 39e768983216b3d8…

MALICIOUS

PDF

44.0 KB Created: 2021-06-04 04:27:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a00b52d5ae2878850cdf7ac04d65a360 SHA-1: aa0dbd988194cdb757f620a41f7d44a81b895792 SHA-256: 39e768983216b3d8c3db3177135d6f28a1c226db34114c0a9b856d1242af58c3
82 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, including one pointing to a suspicious domain associated with game hacks. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be instructing the user to decrypt a payload, and the 'SE_DOWNLOAD_BUTTON' heuristic indicates a lure for downloading content. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • 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/406889139/freespinandcoin-blogspot-coin-master-game-hack
    • http://suaedy-library.net/repository/robux-miner_GM431946152.pdf
    • http://suaedy-library.net/repository/free-robux-pins_GM431946152.pdf
    • http://suaedy-library.net/repository/hack-coin-master-nyc_GM406889139.pdf
    • http://suaedy-library.net/repository/download-hack-coin-master-apk_GM406889139.pdf
    • http://suaedy-library.net/repository/minecraft-windows-10-edition-free_GM479516143.pdf
    • http://suaedy-library.net/repository/coin-master-hack-online-link_GM406889139.pdf
    • http://suaedy-library.net/repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdf
    • http://suaedy-library.net/repository/today-free-spin-coin-master_GM406889139.pdf
    • http://suaedy-library.net/repository/minecraft-app-store-free_GM479516143.pdf
    • http://suaedy-library.net/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://suaedy-library.net/repository/how-to-earn-free-robux_GM431946152.pdf
    • http://suaedy-library.net/repository/toolbox-for-minecraft-windows-10_GM479516143.pdf
    • http://suaedy-library.net/repository/roblox-com-free-robux_GM431946152.pdf
    • http://suaedy-library.net/repository/free-spins-on-coin-master_GM406889139.pdf
    • http://suaedy-library.net/repository/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdf
    • http://suaedy-library.net/repository/coin-master-free-spin-link-app_GM406889139.pdf
    • http://suaedy-library.net/repository/how-to-get-infinite-robux_GM431946152.pdf
    • http://suaedy-library.net/repository/free-minecraft-domain_GM479516143.pdf
    • http://suaedy-library.net/repository/coin-master-heaven-links_GM406889139.pdf
    • http://suaedy-library.net/repository/minecraft-free-download-android_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000514b.bin
8f36e440aec4d3570b95de770bfbf1066ff56a1bc958e30c7d404e3f21f52235		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x514B 24800 bytes
font_01_sfnt_off00008851.bin
2931d6284dbf135659b140410c03fb6a10ec8e1a87db333076a10ec3316c1554		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8851 18636 bytes

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