Malicious PDF — malware analysis report

Static analysis result for SHA-256 7db247f3847c3a3b…

MALICIOUS

PDF

35.3 KB Created: 2021-06-29 05:38:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7f29a1a28e7cf2869f9d00aefc71fd96 SHA-1: d36ccd54b4d7ba30a97d218da78f2f434f93a9f0 SHA-256: 7db247f3847c3a3b2b13bf190838c3ec190568bef827026a2ab12bd3a8d4e7d4
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and text that explicitly mention 'free Robux' and 'game hack', indicating a lure for online game exploits or scams. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the presence of embedded URLs and the document's content suggest it's designed to redirect users to malicious sites for downloading potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/how-to-get-free-robux-with-no-coupon-game-hack PDF link annotation
    • http://lib.stie-aub.ac.id/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-health-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/game-pass-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-server-side-hacking-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-free-models_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/descargar-roblox-hackeado-robux-infinitos_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/minecraft-apk-download-free-11-055_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-pin_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-obey-items-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-empty-roblox-alt-account_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-frost-guard-general-free_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/iiwoodlandheadphones-trife-hacker-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-hack-rar_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-free-robux-with-inspect-2021_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_off0000300f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300F 22764 bytes
SHA-256: b41ca6cd9f0b0646b11e0ca1c52f705a5daddbe874e4b69a41c5e072a49fad15
font_01_sfnt_off00006320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6320 19644 bytes
SHA-256: 766ddec65bccfd2f9cc139288fc299f0057869417680aa2f5a539414dd38b4ce

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