Malicious PDF — malware analysis report

Static analysis result for SHA-256 34efaa94d35ebe5f…

MALICIOUS

PDF

251.3 KB Created: 2021-07-06 09:36:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 84ab4122a678c954144fdad39c29aaf1 SHA-1: 50175d1e8e22c790c4722d1d0f34865fd6cd7f6a SHA-256: 34efaa94d35ebe5f877d7eece03c9149ee2380d4d7ef52139f4aef2ecd28f92c
140 Risk Score

Malware Insights

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

The file is a PDF that displays a fake CAPTCHA and MFA prompt, aiming to trick the user into interacting with a malicious link. The document body and heuristics indicate a lure for advance-fee scams or credential harvesting. The embedded URL, http://netcdn.tw/app/1330123889/pubg-for-uc-game-hack, is likely the destination for the malicious payload or phishing page.

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-for-uc-game-hack
    • https://katalog.smkn1glagah.sch.id/repository/free-spins-coinmaster_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id/repository/minecraft-multiplayer-free_GM479516143.pdf
    • https://katalog.smkn1glagah.sch.id/repository/freespinandcoin-blogspot_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id/repository/free-minecraft-client_GM479516143.pdf
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-free-spins-blogspot_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id/repository/free-spins-on-coin-master-game_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id/repository/free-robux-hack-no-human-verification_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdf
    • https://katalog.smkn1glagah.sch.id/repository/how-to-get-hacked-roblox-accounts-back_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/roblox-cheats-for-scp-site19_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/fireboat-dynamic-ship-simulator-free-roblox_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id//repository/coin-master-free-spins-link-download-hack_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id/repository/how-to-get-coin-master-card-free_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id/repository/is-minecraft-free-on-nintendo-switch_GM479516143.pdf
    • https://katalog.smkn1glagah.sch.id/repository/coin-master-gameplay_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id/repository/free-ways-to-get-robux_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/instagram-free-coin-master-spins_GM406889139.pdf
    • https://katalog.smkn1glagah.sch.id/repository/is-minecraft-free-on-mac_GM479516143.pdf
    • https://katalog.smkn1glagah.sch.id/repository/free-roblox-bots_GM431946152.pdf
    • https://katalog.smkn1glagah.sch.id/repository/roblox-work-at-a-pizza-place-money-cheat-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_024_off000380d4.bin
b9db1970eb35927fea7ecbc9f837d83ffa75a0a1ea1e2f20cc85734d1c94b134		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x380D4 25928 bytes
font_01_sfnt_off0003bde4.bin
ff1c41f633aced60d10ee202deb0ab935279b9042caaf9b74f8a0366a42c17f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3BDE4 18432 bytes

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