Malicious PDF — malware analysis report

Static analysis result for SHA-256 13a19cacad4bb58a…

MALICIOUS

PDF

250.7 KB Created: 2021-07-04 23:49:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f10dc79b011653e9d5176503b1ed77d0 SHA-1: ac0f204b8b039dcf491bf7bed48a87041b601cc6 SHA-256: 13a19cacad4bb58aed37aa38081b78bfde497680ff58d743ceb031022f68b700
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document exhibits characteristics of an advance-fee scam and fake CAPTCHA lure, aiming to trick users into clicking a malicious link. The presence of a fake CAPTCHA and urgency lures, combined with a call-to-action button, strongly suggests a phishing or social engineering attack. The embedded URL points to a suspicious domain associated with game-related hacks, likely serving as a download or redirection point for further malicious activity.

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-ykleme-bedava-game-hack
    • http://lib.untad.ac.id//repository/is-tiktok-free-to-use_GM835599320.pdf
    • http://lib.untad.ac.id/repository/how-to-get-free-face-in-roblox_GM431946152.pdf
    • http://lib.untad.ac.id/repository/coin-master-free-spins-without-human-verification_GM406889139.pdf
    • http://lib.untad.ac.id//repository/spins-gratis-coin-master-hoy_GM406889139.pdf
    • http://lib.untad.ac.id/repository/a-free-robux-site-that-actually-works_GM431946152.pdf
    • http://lib.untad.ac.id//repository/coin-master-hack-no-verification_GM406889139.pdf
    • http://lib.untad.ac.id/repository/roblox-free-avatar-drawing_GM431946152.pdf
    • http://lib.untad.ac.id/repository/epic-mining-2-roblox-hack_GM431946152.pdf
    • http://lib.untad.ac.id/repository/free-robux-scam-the-scammers_GM431946152.pdf
    • http://lib.untad.ac.id/repository/robux-hack-deutsch-pc_GM431946152.pdf
    • http://lib.untad.ac.id/repository/roblox-robux-hack-generator_GM431946152.pdf
    • http://lib.untad.ac.id/repository/robux-claimer_GM431946152.pdf
    • http://lib.untad.ac.id/repository/aristois-minecraft-hack_GM479516143.pdf
    • http://lib.untad.ac.id/repository/roblox-hack-for-change-music_GM431946152.pdf
    • http://lib.untad.ac.id/repository/free-draw-classic-roblox_GM431946152.pdf
    • http://lib.untad.ac.id//repository/how-can-you-get-robux_GM431946152.pdf
    • http://lib.untad.ac.id/repository/robux-free-promo-codes_GM431946152.pdf
    • http://lib.untad.ac.id/repository/how-to-hack-any-account-roblox-2021_GM431946152.pdf
    • http://lib.untad.ac.id/repository/hack-btools-roblox-jailbreak-2021_GM431946152.pdf
    • http://lib.untad.ac.id/repository/roblox-rules-cheating_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_024_off00037c2e.bin
20046b5ff72a13e0cb4ebf0c302b801e163bd670a702bacd4d48f7ad14d0b1e8		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37C2E 25928 bytes
font_01_sfnt_off0003b947.bin
f326f7ee45c192a4778f50adb7096aad98cc3f50ac89390f5487cbabe9e5d95f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3B947 19080 bytes

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