Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9f75db19f000430…

MALICIOUS

PDF

43.0 KB Created: 2021-05-12 12:00:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 009928c6e2efb020d706d86c81c52639 SHA-1: 273616658e698f2607f7cad1e6fdf4533773a913 SHA-256: f9f75db19f0004300255c0f3cf8952ce633abe3b1438c73a5d8c7f6456b7396e
82 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a document body that advertises game hacks and cheats, aiming to trick users into downloading malicious files. The presence of a security bypass heuristic suggests an intent to evade detection, further supporting a malicious classification. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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/431946152/jailbreak-roblox-hack-game-hack
    • http://webstan.be/images/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdf
    • http://webstan.be/images/roblox-hack-ios_GM431946152.pdf
    • http://webstan.be/images/minecraft-free-download-ios_GM479516143.pdf
    • http://webstan.be/images/free-robux-website_GM431946152.pdf
    • http://webstan.be/images/coin-master-heaven-free-spins-today_GM406889139.pdf
    • http://webstan.be/images/codes-how-to-get-free-robux_GM431946152.pdf
    • http://webstan.be/images/get-free-robux-no-verification_GM431946152.pdf
    • http://webstan.be/images/free-coin-master-spins-2021_GM406889139.pdf
    • http://webstan.be/images/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdf
    • http://webstan.be/images/roblox-hack-ga_GM431946152.pdf
    • http://webstan.be/images/coin-master-fan-page_GM406889139.pdf
    • http://webstan.be/images/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdf
    • http://webstan.be/images/free-minecraft-maps-pe_GM479516143.pdf
    • http://webstan.be/images/how-do-i-get-free-robux_GM431946152.pdf
    • http://webstan.be/images/who-to-get-free-robux_GM431946152.pdf
    • http://webstan.be/images/free-robux-for-kids_GM431946152.pdf
    • http://webstan.be/images/coin-master-game-hack-version-download_GM406889139.pdf
    • http://webstan.be/images/how-to-get-free-minecraft-alts_GM479516143.pdf
    • http://webstan.be/images/hack-coin-master-apk-download_GM406889139.pdf
    • http://webstan.be/images/robux-converter_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048c7.bin
04a97c47edc6fde51757242f8a0c4d1aad649f596a5694c772563defdfb10407		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48C7 26556 bytes
font_01_sfnt_off0000852a.bin
47180ef6fd58f08eabdcf8de8850cf434555edaa977bcc29afa6d0c928aef64e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x852A 18468 bytes

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