Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c774b6d94d4b02a…

MALICIOUS

PDF

44.3 KB Created: 2021-06-07 03:42:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6c2827dc81e5614fb54f136b85a79f69 SHA-1: bff8b97600f3fe064b336404ec991bbe2dee8ff6 SHA-256: 6c774b6d94d4b02a99e58c384e0705d66835292c247f980ced72d909af3c05bb
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or verification prompt to trick users into downloading potentially malicious files, as indicated by the 'SE_FAKE_CAPTCHA' heuristic. It contains numerous embedded URLs pointing to sites offering game cheats and hacks, such as 'free-download-of-roblox-game-game-hack'. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to deliver a second-stage payload via a malicious URL, aligning with T1204.002 (Malicious Link).

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.tw/app/431946152/free-download-of-roblox-game-game-hack
    • http://libsmpn1balongpo.sch.id//repository/robux-hack-no-human-verification_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/roblox-army-free-robux_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/free-robux-live_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/coin-master-hack-2021-no-survey_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/roblox-com-hack_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/tiktok-free-10k-followers_GM835599320.pdf
    • http://libsmpn1balongpo.sch.id/repository/minecraft-pc-free_GM479516143.pdf
    • http://libsmpn1balongpo.sch.id//repository/free-coin-master-spins-link_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/real-free-robux-codes_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/202100-free-spins-coin-master_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/coin-master-2021_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/how-to-hack-roblox-2021_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/coin-master-mod-apk-latest-version-free-download_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/free-robux-no-verification-no-download-2021_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id/repository/coin-master-free-spin-and-coin_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/free-robux-with-no-human-verification_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/will-minecraft-dungeons-be-free_GM479516143.pdf
    • http://libsmpn1balongpo.sch.id/repository/minecraft-realms-free-trial_GM479516143.pdf
    • http://libsmpn1balongpo.sch.id//repository/free-coin-and-spin-in-coin-master_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id/repository/how-to-get-free-robux-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005030.bin
887378c3837bd13037e177fdb386aeedc022a2e4cdf0ebd35e91d7131ebb63b7		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5030 24424 bytes
font_01_sfnt_off0000887f.bin
eea45b73d2e9099baf5e6a5daba54d5c71ef0005d27fc579e6fc41fd4de2f1b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x887F 18944 bytes

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