Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d816772efa449ee…

MALICIOUS

PDF

38.3 KB Created: 2021-06-18 08:28:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f113a420580d477c749eab9001f63477 SHA-1: 65369f2624c1208077c3b70c6643b4683f72d4c9 SHA-256: 5d816772efa449ee8aea0ad662358561c4e167cbddffc36fe02e3d398fb1c103
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game cheats and in-game currency, directing users to download files from external URLs. The presence of 'cmd_GM431946152.pdf' in the document text suggests an attempt to execute commands, likely to download and run a secondary payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 4

  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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 http://netcdn.co/app/431946152/how-to-hack-robux-on-phone-game-hack
    • http://lib.smklabor.sch.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • http://lib.smklabor.sch.id/repository/intriga-roblox-hack_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/roblox-hack-me-robux-no-human-verification_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/free-spins-coin-master-2021-app_GM406889139.pdf
    • http://lib.smklabor.sch.id/repository/coin-master-free-download-app_GM406889139.pdf
    • http://lib.smklabor.sch.id/repository/money-cheats-roblox-cmd_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/free-roblox-robux-giftcards_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/free-robux-real-2021_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/get-robux-today_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/minecraft-pocket-edition-apk-free-download_GM479516143.pdf
    • http://lib.smklabor.sch.id/repository/ac-market-coin-master-hack_GM406889139.pdf
    • http://lib.smklabor.sch.id/repository/how-to-hack-coin-master-ios-2021_GM406889139.pdf
    • http://lib.smklabor.sch.id/repository/coin-master-tiradas-gratis-2021_GM406889139.pdf
    • http://lib.smklabor.sch.id/repository/without-pokemon-go-free-download_GM1094591345.pdf
    • http://lib.smklabor.sch.id/repository/free-spins-on-coin-master-generator_GM406889139.pdf
    • http://lib.smklabor.sch.id/repository/is-there-a-free-coding-platform-for-roblox_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/freespinandcoin-blogspot_GM406889139.pdf
    • http://lib.smklabor.sch.id/repository/how-can-i-get-free-robux-without-paying_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/coin-master-gameplay_GM406889139.pdf
    • http://lib.smklabor.sch.id/repository/roblox-free-clothes-in-catalog_GM431946152.pdf
    • http://lib.smklabor.sch.id/repository/fr
    • https://www.roblox.com/.I
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003c03.bin
428ac8f036c1926f13e587553013827936cc0ff431f88aa6bfeefef92bd0188c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3C03 23436 bytes
font_01_sfnt_off00007063.bin
962bea862472ebd67f665f9210c06f8702414cceb46c360eed37a80c01d15a90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7063 19204 bytes

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