Malicious PDF — malware analysis report

Static analysis result for SHA-256 c855727cb87cae54…

MALICIOUS

PDF

251.4 KB Created: 2021-07-05 00:28:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7603bd6e438c0d9850e577ec71928c44 SHA-1: 81b313575c582e9b403b628249e02cad6d5b5007 SHA-256: c855727cb87cae5417e75f8d63ecc6e8f61bde52e32469791c02de0582edb56c
140 Risk Score

Malware Insights

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

The document exhibits characteristics of an advance-fee scam and a fake CAPTCHA lure, aiming to trick users into believing they can get in-game currency or hack game accounts. The presence of an external URI pointing to a suspicious domain suggests a redirection to a malicious site for further exploitation, likely involving credential harvesting or a phishing attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0098

Heuristics 7

  • 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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/1330123889/pubg-uc-carding-method-2021-game-hack
    • https://digilib.stikesindramayu.ac.id/repository/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdf
    • https://digilib.stikesindramayu.ac.id/repository/free-roblox-character-editor_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/how-to-hack-a-website-username-on-roblox_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-free-funds-on-roblox_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/hack-yourself-levels-in-roblox-phantom-forces_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/robux-match_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/claimrobux-net_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/roblox-walking-through-wall-hacks_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/robux-in_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/free-coin-master-link-2021_GM406889139.pdf
    • https://digilib.stikesindramayu.ac.id/repository/roblox-noclip-no-cheat-engine_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/brother-cheating-on-his-roblox-girlfriend_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/roblox-robux-codes-2021_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-free-robux-in-roblox-hack_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/minecraft-free-download-android-apk-014-0_GM479516143.pdf
    • https://digilib.stikesindramayu.ac.id/repository/roblox-hack-generator_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/blox-pink-robux-free_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-working_GM431946152.pdf
    • https://digilib.stikesindramayu.ac.id/repository/hack-my-spins-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_024_off00037dd4.bin
9015a04527ca66abf6850b42143a276ca38c86312e3352f46bcd0181accde062		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37DD4 25928 bytes
font_01_sfnt_off0003bae8.bin
49c328e0d40eb2b23b20f441756811fb5f852f0995c3fc16c23455f40f351f66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3BAE8 19432 bytes

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