Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f5307bafeccc62f…

MALICIOUS

PDF

250.4 KB Created: 2021-07-07 03:02:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9bfb300ba3411f95f0b52b24b48af91b SHA-1: c8753d35e61694339e9559b91a2805412e189fdd SHA-256: 7f5307bafeccc62fdb3f3102e5868e0e9135660d43bd1c543ea7019032bfdd36
140 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of an advance-fee scam, using lures such as a fake CAPTCHA and the promise of a prize to trick users. The document also contains a direct link to a suspicious URL, likely intended to lead the user to download a malicious payload. No scripts were extracted, but the presence of embedded URLs and scam-related heuristics strongly suggests a phishing or malware distribution 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-murah-game-hack
    • http://www.salwangurgaon.com/files/coin-master-hack-twitter_GM406889139.pdf
    • http://www.salwangurgaon.com/files/can-you-get-roblox-studio-free_GM431946152.pdf
    • http://www.salwangurgaon.com/files/free-robux-codes-genorateor_GM431946152.pdf
    • http://www.salwangurgaon.com/files/coin-master-daily-free-spin-app_GM406889139.pdf
    • http://www.salwangurgaon.com/files/mobihack-roblox-hack_GM431946152.pdf
    • http://www.salwangurgaon.com/files/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdf
    • http://www.salwangurgaon.com/files/free-roblox-dances_GM431946152.pdf
    • http://www.salwangurgaon.com/files/roblox-hack-client_GM431946152.pdf
    • http://www.salwangurgaon.com/files/daily-coin-master-free-spins_GM406889139.pdf
    • http://www.salwangurgaon.com/files/i-got-hacked-on-roblox_GM431946152.pdf
    • http://www.salwangurgaon.com/files/how-to-get-free-robux-easy_GM431946152.pdf
    • http://www.salwangurgaon.com/files/free-roblox-injector_GM431946152.pdf
    • http://www.salwangurgaon.com/files/how-to-hack-bleach-soul-of-end-roblox_GM431946152.pdf
    • http://www.salwangurgaon.com/files/robux-free-robux_GM431946152.pdf
    • http://www.salwangurgaon.com/files/free-robux-redeem-codes-2021_GM431946152.pdf
    • http://www.salwangurgaon.com/files/free-robux-today_GM431946152.pdf
    • http://www.salwangurgaon.com/files/minecraft-pe-free-apk_GM479516143.pdf
    • http://www.salwangurgaon.com/files/how-to-get-free-robux-promotion-link_GM431946152.pdf
    • http://www.salwangurgaon.com/files/easy-robux-today_GM431946152.pdf
    • http://www.salwangurgaon.com/files/roblox-hack-mega-13_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_024_off00037d06.bin
f7d6ac55247dd1a3ada7aed3ed1c1f3e50606c995d7db5a0747465b2aec2794c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37D06 25928 bytes
font_01_sfnt_off0003ba25.bin
7b4872c6df0e61f564b473bb7a2ff5e614156559a9be8c72cd19c5b01172c0e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3BA25 18488 bytes

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