Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8c0888f47debdb6…

MALICIOUS

PDF

249.8 KB Created: 2021-07-04 10:03:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2ae45b621d0b3d42ab5becc04fa18e89 SHA-1: c1b32e6389e3006a34828d945cb35031cf1ddbf1 SHA-256: d8c0888f47debdb6b75af35c840ee27bc496cd144bb5f05432b6be6b2c3fdbce
140 Risk Score

Malware Insights

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

The document employs a fake CAPTCHA and advance-fee scam lure to trick the user into interacting with malicious links, likely to download a second-stage payload. The presence of multiple URLs related to game cheats and in-game currency suggests a theme aimed at gamers. No scripts were extracted, but the PDF structure and embedded URLs indicate a phishing or social engineering 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-transfer-game-hack
    • http://lib.kunci.or.id/repository/roblox-cheats-for-ios_GM431946152.pdf
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-in-1-minute-2021_GM431946152.pdf
    • http://lib.kunci.or.id/repository/free-links-for-coin-master_GM406889139.pdf
    • http://lib.kunci.or.id/repository/robux-free-2021_GM431946152.pdf
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-fast_GM431946152.pdf
    • http://lib.kunci.or.id/repository/roblox-gun-script-hack-r15_GM431946152.pdf
    • http://lib.kunci.or.id/repository/v3rmillion-roblox-cheat-engine-table-lua-script_GM431946152.pdf
    • http://lib.kunci.or.id/repository/white-pants-roblox-free_GM431946152.pdf
    • http://lib.kunci.or.id/repository/robux-games_GM431946152.pdf
    • http://lib.kunci.or.id/repository/free-spin-in-coin-master_GM406889139.pdf
    • http://lib.kunci.or.id/repository/cheat-engine-roblox-tycoon_GM431946152.pdf
    • http://lib.kunci.or.id/repository/how-to-play-minecraft-online-for-free_GM479516143.pdf
    • http://lib.kunci.or.id/repository/how-to-earn-robux-for-free-2021_GM431946152.pdf
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-on-phone_GM431946152.pdf
    • http://lib.kunci.or.id/repository/games-on-roblox-that-give-u-free-robux_GM431946152.pdf
    • http://lib.kunci.or.id/repository/blogger-coin-master-free-spins_GM406889139.pdf
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdf
    • http://lib.kunci.or.id/repository/roblox-free-items_GM431946152.pdf
    • http://lib.kunci.or.id/repository/hacks-for-minecraft-windows-10_GM479516143.pdf
    • http://lib.kunci.or.id/repository/coin-master-free-spins-link-blogspot-april-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_024_off00037baf.bin
b48a0d21108a05904c544f136a10a441fcf98c44ed3b46bbc818fdf173e86147		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37BAF 25928 bytes
font_01_sfnt_off0003b8c1.bin
7e88932982e4abe7c604a3ab8dae2774f877ca3035bc2f4f236290b96f848970		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3B8C1 18124 bytes

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