Malicious PDF — malware analysis report

Static analysis result for SHA-256 189ad1bca07028de…

MALICIOUS

PDF

250.7 KB Created: 2021-07-06 06:11:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 30bbf9aee25f519ec32a6e60e65febe6 SHA-1: 7e5e50c5dbbcf8452c911a8da8e5ad9f5d06559a SHA-256: 189ad1bca07028decf3ccd9dc8b0024ed4e2c5734cae68c025ad97d471b3fcbe
140 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of an advance-fee scam and fake CAPTCHA lure, aiming to trick users into clicking malicious links. The presence of MFA lure heuristics suggests an attempt to harvest one-time codes or session tokens. The primary IOC is the external URL embedded within the document, which likely serves as a download source for a secondary payload.

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-seagm-game-hack
    • http://pustaka.pn-calang.go.id/repository/free-stuff-roblox-catalog-2021_GM431946152.pdf
    • http://www.pustaka.pn-calang.go.id/repository/anarchy-hack-roblox_GM431946152.pdf
    • http://pustaka.pn-calang.go.id/repository/how-to-get-free-robux-in-meep-city-2021_GM431946152.pdf
    • http://pustaka.pn-calang.go.id/repository/how-to-hack-client-side-scripts-in-roblox_GM431946152.pdf
    • http://pustaka.pn-calang.go.id/repository/coin-master-hack-without-verification_GM406889139.pdf
    • http://www.pustaka.pn-calang.go.id/repository/i-robux_GM431946152.pdf
    • http://pustaka.pn-calang.go.id/repository/free-my-robux_GM431946152.pdf
    • http://pustaka.pn-calang.go.id/repository/roblox-how-to-cheat-on-tycoon-games-2021_GM431946152.pdf
    • http://pustaka.pn-calang.go.id/repository/free-tiktok-fans-and-likes_GM835599320.pdf
    • http://pustaka.pn-calang.go.id/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-hack-download-apk_GM406889139.pdf
    • http://www.pustaka.pn-calang.go.id/repository/master-coin-hack-game_GM406889139.pdf
    • http://pustaka.pn-calang.go.id/repository/free-coin-master-spins-2021_GM406889139.pdf
    • http://www.pustaka.pn-calang.go.id/repository/hack-minecraft_GM479516143.pdf
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-2021-free-spins_GM406889139.pdf
    • http://www.pustaka.pn-calang.go.id/repository/free-roblox-hack_GM431946152.pdf
    • http://pustaka.pn-calang.go.id/repository/nopde-engine-64-roblox-hacks-download_GM431946152.pdf
    • http://pustaka.pn-calang.go.id/repository/free-likes-for-tiktok_GM835599320.pdf
    • http://pustaka.pn-calang.go.id/repository/how-to-get-build-tools-on-roblox-cheating-2021_GM431946152.pdf
    • http://www.pustaka.pn-calang.go.id/repository/minecraft-items_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_024_off00037e1f.bin
018a975442ead86761f564f2db1c2f936caee1732b218085c46cde85fe96cbf1		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37E1F 26180 bytes
font_01_sfnt_off0003bb7d.bin
a6b6f4e7a4e448006201162ffe3eecb11707f6ef6a57b73b6983f5c68b806f2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3BB7D 18388 bytes

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