Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2221091cdb1ddac…

MALICIOUS

PDF

45.9 KB Created: 2021-05-31 01:23:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ade9e463692c7ca5f21f06f0d58605bf SHA-1: 8bfc61af35d10d397fbb6165516ab1d35483d56d SHA-256: b2221091cdb1ddaccddee9b46289221c6e2ec8dde6f0784b116c2505ea8c2d57
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, including one pointing to 'netcdn.xyz' which is associated with 'give-me-free-robux-game-hack'. The presence of a download button lure and callback phishing lure heuristics, combined with the ML classifier flagging it as malicious, strongly suggests a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded links indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9580

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 https://netcdn.xyz/app/431946152/give-me-free-robux-game-hack PDF link annotation
    • https://www.ecegrants.on.ca/wp-content/uploads/fsqm-files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.ecegrants.on.ca/wp-content/uploads/fsqm-files/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://www.ecegrants.on.ca/wp-content/uploads/fsqm-files/tiktok-fans-free_GM835599320.pdfIn PDF document text
    • https://www.ecegrants.on.ca/wp-content/uploads/fsqm-files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://www.ecegrants.on.ca/wp-content/uploads/fsqm-files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.ecegrants.on.ca/wp-content/uploads/fsqm-files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • https://www.ecegrants.on.ca/wp-content/uploads/fsqm-files/free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.ecegrants.on.ca/wp-content/uploads/fsqm-files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://www.ecegrants.on.ca/wp-content/uploads/fsqm-files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ecegrants.on.ca/wp-content/uploads/fsqm-files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://www.ecegrants.on.ca/wp-content/uploads/fsqm-files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ecegrants.on.ca/wp-content/uploads/fsqm-files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://www.ecegrants.on.ca/wp-content/uploads/fsqm-files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ecegrants.on.ca/wp-content/uploads/fsqm-files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ecegrants.on.ca/wp-content/uploads/fsqm-files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • https://www.ecegrants.on.ca/wp-content/uploads/fsqm-files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://www.ecegrants.on.ca/wp-content/uploads/fsqm-files/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • https://www.ecegrants.on.ca/wp-content/uploads/fsqm-files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • https://www.ecegrants.on.ca/wp-content/uploads/fsqm-files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.ecegrants.on.ca/wp-content/uploads/fsqm-files/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ecegrants.on.ca/wp-content/uploads/fsqm-files/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://www.ecegrants.on.ca/wp-content/uploads/fsqm-files/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • https://www.ecegrants.on.ca/wp-content/uploads/fsqm-files/free-tiktok-likes-app_GM835599320.pdfIn PDF document text
    • https://www.ecegrants.on.ca/wp-content/uploads/fsqm-files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • https://www.ecegrants.on.ca/wp-content/uploads/fsqm-files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.ecegrants.on.ca/wp-content/uploads/fsqm-files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://www.ecegrants.on.ca/wp-content/uploads/fsqm-files/minecraft-education-free_GM479516143.pdfIn PDF document text
    • https://www.ecegrants.on.ca/wp-content/uploads/fsqm-files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.ecegrants.on.ca/wp-content/uploads/fsqm-files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ecegrants.on.ca/wp-content/uploads/fsqm-files/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00005561.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5561 25524 bytes
SHA-256: d2396d6701986c11a9d0088509d3c9587f5a4e561c316cc5d11574e8f1ba1745
font_01_sfnt_off00008ff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF0 18444 bytes
SHA-256: 68319dbf483afe81c5a4de3b3f5290fc223d358c0f75f000dd988daf46eb7eae