Malicious PDF — malware analysis report

Static analysis result for SHA-256 551a80e690a5c4b6…

MALICIOUS

PDF

45.6 KB Created: 2021-05-14 06:11:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0d41020b0d1d7bd464a3c5e8d97088e5 SHA-1: 3107e3e5fb6c81bfaeb23da12948d1b43120948d SHA-256: 551a80e690a5c4b6804a107a17f74a13529a731249496a4717b650a5bacacbe5
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are SEO-optimized and point to files related to 'Coin Master' hacks. The document body also contains a URL that appears to be a direct download link for a hack application. This suggests the document is designed to trick users into downloading malware disguised as game cheats. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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-hack-apk-facebook-login-game-hack
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/coin-master-free-coins_GM406889139.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/free-downloads-for-coin-master-daily-rewards_GM406889139.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/coin-master-free-spins-hacktman_GM406889139.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/free-coin-master-spins-blog_GM406889139.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/how-to-hack-coin-master-pc_GM406889139.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/daily-coin-master-free-spins_GM406889139.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/how-to-get-more-robux-for-free_GM431946152.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/coin-master-hack-no-root_GM406889139.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/minecraft-pe-hack-client-ios_GM479516143.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/minecraft-free-play-no-download_GM479516143.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/how-to-get-free-robux-generator_GM431946152.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/roblox-piano-hack_GM431946152.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/20-free-spin-link-coin-master_GM406889139.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/get-coin-master-free-spin_GM406889139.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/minecraft-free-minecoins_GM479516143.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/free-robux-generator-com-roblox-hack_GM431946152.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/free-robux-hack-us_GM431946152.pdf
    • http://pjj.mtsntpi.my.id/__statics/gudangsoal/files/free-minecraft-java-edition-codes_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049c4.bin
8baa23e001eef4b96c4f81f98e9186555424caadcc4b189890d20f21761e9897		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49C4 26024 bytes
font_01_sfnt_off000084e6.bin
601c50867a41b9362538ff18e5f9479a0f9badf698aaf1eb7e88469c11719db7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84E6 2920 bytes
font_02_sfnt_off00008f00.bin
09f845dbab102c2a44680f08ef0cb39b809a24ce37ab1af9b7c1c0a4ff52117a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F00 18504 bytes

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