Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a033bb2da7678a8…

MALICIOUS

PDF

250.3 KB Created: 2021-07-05 12:50:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e78d50d4c409f1efff8492d3cf14d82d SHA-1: cae909eea3db9c58d5f8d43321c75b90dde43990 SHA-256: 3a033bb2da7678a85ae1b62b95c1fd5accb59e9f155b7831a694378974e52111
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal User Data

The PDF document employs a fake CAPTCHA lure (SE_FAKE_CAPTCHA) and an MFA lure (SE_MFA_LURE) to trick users into interacting with malicious content. It also contains an external URI pointing to 'http://netcdn.tw/app/1330123889/pubg-uc-quiz-game-hack', which is likely the next stage of the attack. The document body, though heavily obfuscated, contains references to game-related lures, consistent with advance-fee scam tactics (SE_ADVANCE_FEE_SCAM_LURE).

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-quiz-game-hack
    • http://stikgiamakassar.ac.id/digilib/repository/rbx-website_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/best-site-for-free-coin-master_GM406889139.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/how-to-hack-coin-master_GM406889139.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/how-to-hack-robux_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/free-2021-robux_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/roblox-bux-free_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/free-robux-no-tix_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-free-coins-2021_GM406889139.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/free-robux-hack-us_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/hack-app-data-roblox_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/roblox-robux-hack_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/roblox-studio-free-download_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-hack-mod-apk-android-1_GM406889139.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-hack-tool-v1-9-apk_GM406889139.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/how-to-add-a-second-floor-in-roblox-bloxburg-free_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/roblox-project-pokemon-dupe-hack_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/how-to-hack-someones-roblox-account_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-game-hunter_GM406889139.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/get-me-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_024_off00037c29.bin
3f3ac8cf17e83595ebeff31e207e60149c04afeba7b7efa302d05948ff905295		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37C29 26028 bytes
font_01_sfnt_off0003b96a.bin
1d0beb5c24672de0ae3200dc225680e897819202e0d6660e1cac79c59ff35e32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3B96A 18488 bytes

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