Malicious PDF — malware analysis report

Static analysis result for SHA-256 233fca3ac72dba3a…

MALICIOUS

PDF

33.0 KB Created: 2021-07-20 15:23:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 0aaf89a6e17b4ab70e514d62fa0e9455 SHA-1: e6af3016edec94e57d3aab787ce58fd90678fb4b SHA-256: 233fca3ac72dba3a20aa5a00c6f0a48f0cedc9fb0736524a5d66c35e4afa597f
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains multiple URLs pointing to sites offering free in-game currency and items, such as TikTok likes and Roblox Robux. The presence of a "CLICK HERE TO ACCESS TIKTOK GENERATOR" call-to-action, combined with the ML classifier's high confidence, indicates a malicious intent to lure users to potentially harmful websites. The document's structure and content suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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 http://netcdn.tw/app/835599320/tiktok-likes-for-free-game-hack PDF link annotation
    • http://hilro.co.za/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • http://hilro.co.za/images/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://hilro.co.za/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://hilro.co.za/images/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://hilro.co.za/images/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://hilro.co.za/images/free-tiktok-likes-no-survey_GM835599320.pdfIn PDF document text
    • http://hilro.co.za/images/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://hilro.co.za/images/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://hilro.co.za/images/get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://hilro.co.za/images/how-to-get-free-robux-with-no-verification_GM431946152.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
font_00_sfnt_off00002e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E11 22848 bytes
SHA-256: 9b5a464ea3911baf5bc69fe63feb9252a8b08e370edd1c280a08a5a78e8b2c0f
font_01_sfnt_off00006165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6165 17456 bytes
SHA-256: 6bc07a916d4e04dd857b15fc22f6a85a1633f574b63a4730ea8dc15634c660b5

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