Malicious PDF — malware analysis report

Static analysis result for SHA-256 744dec255c808ba2…

MALICIOUS

PDF

250.9 KB Created: 2021-07-05 22:35:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 72e3ac29b5713cb53e85fd0787fd305a SHA-1: c6440f988b3580e6de40876f8d5cb8b971ff386a SHA-256: 744dec255c808ba213f7c7a327d7a1eda93171a503ecb79bc70b0a0869350f8c
140 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of an advance-fee scam, including a fake CAPTCHA and urgency lures. It also contains a prominent link to download a file, likely a second-stage payload. The presence of multiple heuristics related to scams and the embedded URL strongly suggest a malicious intent to trick the user into downloading and executing further malware.

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-2-all-pro-game-hack
    • http://perpustakaan.baytalhikmah.sch.id/repository/cmaster-club-coin-master-hack-tool_GM406889139.pdf
    • http://www.perpustakaan.baytalhikmah.sch.id//repository/download-hack-coin-master_GM406889139.pdf
    • http://www.perpustakaan.baytalhikmah.sch.id//repository/free-minecraft-accounts-2021_GM479516143.pdf
    • http://perpustakaan.baytalhikmah.sch.id/repository/free-coin-master-spins-2021_GM406889139.pdf
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/roblox-prison-life-hacks_GM431946152.pdf
    • http://perpustakaan.baytalhikmah.sch.id/repository/how-to-hack-kingdom-life-in-roblox_GM431946152.pdf
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/roboxy-com-for-robux-free_GM431946152.pdf
    • http://perpustakaan.baytalhikmah.sch.id/repository/free-roblox-card_GM431946152.pdf
    • http://perpustakaan.baytalhikmah.sch.id/repository/coin-master-mod-apk-free-download_GM406889139.pdf
    • http://perpustakaan.baytalhikmah.sch.id/repository/youtube-how-to-get-free-robux_GM431946152.pdf
    • http://perpustakaan.baytalhikmah.sch.id/repository/robux-free-legalement_GM431946152.pdf
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/free-roblox-accounts-2021-may_GM431946152.pdf
    • http://perpustakaan.baytalhikmah.sch.id/repository/free-install-roblox_GM431946152.pdf
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/apps-that-give-you-free-robux_GM431946152.pdf
    • http://perpustakaan.baytalhikmah.sch.id/repository/2021202168-roblox-code-hack_GM431946152.pdf
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/roblox-kick-a-player-with-cheat-engine_GM431946152.pdf
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/roblox-hack-pack-download_GM431946152.pdf
    • http://perpustakaan.baytalhikmah.sch.id/repository/free-cute-outfits-on-royale-high-roblox_GM431946152.pdf
    • http://perpustakaan.baytalhikmah.sch.id/repository/robux-hack-100-real_GM431946152.pdf
    • http://perpustakaan.baytalhikmah.sch.id/repository/does-roblox-premium-expire_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_024_off00037e94.bin
d09e4558e6e579da98ba1b7a18c627101562341f67df24b2871e9550de8d67a6		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37E94 26180 bytes
font_01_sfnt_off0003bbfe.bin
540aa6966fcae16907d84948a8c74d29cc04ead3e1c86e50bb89abc4034d1079		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3BBFE 18468 bytes

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