Malicious PDF — malware analysis report

Static analysis result for SHA-256 2adcf05bab707415…

MALICIOUS

PDF

35.3 KB Created: 2021-07-09 05:00:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 63da509d7ccd099949042e0fa0d0cd74 SHA-1: a1f27c970db35f9a8a685b64260f290aec701eda SHA-256: 2adcf05bab7074155aa5b69d234e4598c5689c92d4a8c04ee67a8f9fc8fece25
82 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs and document text that explicitly mention "hack" and "free game cheats" for popular games like Roblox and Coin Master. The heuristic SE_LOLBIN_RUN_COMMAND firing suggests the document may attempt to execute commands, likely to download or execute further payloads from the provided URLs. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.tw/app/431946152/free-roblox-hack-game-hack
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/free-roblox-link_GM431946152.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/free-tiktok-followers-quora_GM835599320.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/how-to-use-cmd-to-hack-roblox_GM431946152.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/free-coin-master-hack-no-verification_GM406889139.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/ice-cream-simulator-roblox-hacks_GM431946152.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/can-you-play-minecraft-for-free_GM479516143.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-apk-35-33_GM406889139.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-xyz-download_GM406889139.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/www-robux-redeem_GM431946152.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/without-pokemon-go-free-remote-raid-pass_GM1094591345.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/coin-master-levels_GM406889139.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/new-cheat-emgine-hack-roblox-jailbreak_GM431946152.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/free-minecraft-windows-10-account_GM479516143.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/free-roblox-adopt-me-accounts_GM431946152.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/roblox-free-cape-catalog_GM431946152.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/robloxcom-get-free-robux-only-today-adverts-click-link-below_GM431946152.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-on-a-samsung-tablet_GM431946152.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/free-robux-without-any-verification_GM431946152.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/real-robux-generator-2021_GM431946152.pdf
    • http://pn-singaraja.go.id/new/public/ckfinder/userfiles/files/how-to-hack-assassin-in-roblox_GM431946152.pdf
    • http://pn-singaraja.go.id
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003237.bin
de80554b312ed80945f800ef101dafc3f6e4c675660ec21b9ed96ab415e419fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3237 22944 bytes
font_01_sfnt_off000065ce.bin
cf67562a6930539490549aeb8f0b318a0b45b3e5cb7414ef3283f960707338b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65CE 18820 bytes

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