Malicious PDF — malware analysis report

Static analysis result for SHA-256 53658bfe26c467be…

MALICIOUS

PDF

44.7 KB Created: 2021-05-17 18:00:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 659465569a98cfb83effb34fc4d2a49f SHA-1: b08833da95b1904edf495de4005739423fce1a31 SHA-256: 53658bfe26c467be93b2dc994ec5b06e66282a2722484b54b59885de59c1ce82
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to websites offering game cheats and hacks. The primary URL, https://netcdn.xyz/app/406889139/coin-master-free-spin-today-game-hack, suggests a lure for the game Coin Master. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the structure and embedded links strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 4

  • 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.
  • 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.xyz/app/406889139/coin-master-free-spin-today-game-hack
    • http://neltalen.nl/images/free-coin-master-spins-links-2021_GM406889139.pdf
    • http://neltalen.nl/images/coin-master-free-spins-1-coin-master_GM406889139.pdf
    • http://neltalen.nl/images/minecraft-free-apk-java-edition_GM479516143.pdf
    • http://neltalen.nl/images/free-spin-link-coin-master-today_GM406889139.pdf
    • http://neltalen.nl/images/master-coin-hack-app_GM406889139.pdf
    • http://neltalen.nl/images/try-minecraft-free_GM479516143.pdf
    • http://neltalen.nl/images/free-robux-obby_GM431946152.pdf
    • http://neltalen.nl/images/how-to-hack-into-someones-roblox-account_GM431946152.pdf
    • http://neltalen.nl/images/how-do-you-install-minecraft-for-free_GM479516143.pdf
    • http://neltalen.nl/images/free-robux-no-verify_GM431946152.pdf
    • http://neltalen.nl/images/robux-free-online_GM431946152.pdf
    • http://neltalen.nl/images/coin-master-free-spin-link-app_GM406889139.pdf
    • http://neltalen.nl/images/coin-master-claim-spins_GM406889139.pdf
    • http://neltalen.nl/images/how-to-hack-roblox-accounts_GM431946152.pdf
    • http://neltalen.nl/images/roblox-free-robux-no-human-verification_GM431946152.pdf
    • http://neltalen.nl/images/coin-master-gold-cards-hack_GM406889139.pdf
    • http://neltalen.nl/images/can-you-give-me-free-robux_GM431946152.pdf
    • http://neltalen.nl/images/minecraft-windows-10-edition-free-with-java_GM479516143.pdf
    • http://neltalen.nl/images/coin-master-hack-tool-apk-download_GM406889139.pdf
    • http://neltalen.nl/images/free-game-pack-with-google-play-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047c7.bin
5f4023a49326c62f3e863dbf0b5e9983179db750ac3c450ca486bf62daba072a
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47C7 25732 bytes
font_01_sfnt_off0000820c.bin
d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855
pdf-font-stream PDF embedded font (sfnt) at offset 0x820C 2868 bytes
font_02_sfnt_off00008bf6.bin
a96ac7afd25cadbabafd1b9dbf0a180d0c1833ed2d07acb4363f122556c39d20
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF6 18240 bytes