Malicious PDF — malware analysis report

Static analysis result for SHA-256 74d4cc1cef411881…

MALICIOUS

PDF

251.0 KB Created: 2021-07-09 04:44:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8366781ff4cd7096ce58c0f5945a4660 SHA-1: 12cd44da5c92f96fe770761c00310bb1b78738d8 SHA-256: 74d4cc1cef4118817c7289949ed464bdab7e9175acb9534228a684817528a71a
140 Risk Score

Malware Insights

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

The PDF document exhibits multiple high-severity heuristics indicating a malicious lure. It presents a fake CAPTCHA, an advance-fee scam lure, and an MFA/one-time-code harvesting lure, all designed to trick the user. The embedded URI points to a suspicious URL, likely serving as the initial stage for a download or credential 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-2021-game-hack
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/temple-free-roblox_GM431946152.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-robux-games-on-roblox_GM431946152.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-items-with-inspect-roblox_GM431946152.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/get-free-spins-coin-master-2021_GM406889139.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/minecraft-app-store-free_GM479516143.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/minecraft-bedrock-server-hosting-free_GM479516143.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-minecraft-skin-maker_GM479516143.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/coin-master-hacks-that-actually-work_GM406889139.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/can-you-really-hack-coin-master-ios_GM406889139.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/coin-master-free-spins-and-coins-daily_GM406889139.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/ww-free-robux_GM431946152.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/coin-master-cracked-apk-free-download_GM406889139.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-robux-pastebin_GM431946152.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/coin-master-spin-free_GM406889139.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/link-for-free-spins-on-coin-master_GM406889139.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/guess-the-emoji-roblox-cheats_GM431946152.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/free-robux-hack-no-human-verification_GM431946152.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/earn-points-for-robux_GM431946152.pdf
    • https://darulfalah-tulungagung.com/__statics/gudangsoal/files/heroes-online-roblox-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_024_off00037e6f.bin
78189e8e63047b597e7efda81904181668c5e8ed673ec023eca42d79d4c58c4a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37E6F 26284 bytes
font_01_sfnt_off0003bc0a.bin
abd6d69eef3aef39d16a33c9b4538e578f954ab223fb5d9fb26cd688dc2cfc5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3BC0A 18528 bytes

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