PDF static analysis report

Static analysis result for SHA-256 b77fc1e20dcd34f8…

SUSPICIOUS

PDF

42.8 KB Created: 2021-06-11 04:55:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 086a0c7e90cfd724bf6b12d98ad62ef0 SHA-1: 3405a2216cf0f141c0e88de8679fdf5a5471edc8 SHA-256: b77fc1e20dcd34f872232c31aa10cbe74d272574da8104a70e173bfaca3d211e
42 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a visual download button lure, strongly suggesting an attempt to trick the user into downloading a secondary payload. The primary URL, 'https://netcdn.tw/app/431946152/robux-hack-no-survey-no-offer-game-hack', is particularly suspicious given the context of 'robux hack'. While no scripts were directly extracted, the ML classifier's high confidence score and the presence of external URIs indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

Heuristics 3

  • 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.tw/app/431946152/robux-hack-no-survey-no-offer-game-hack PDF link annotation
    • https://www.wco.org.uk/uploads/files/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/moonactive-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-homepage_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-apk-hack-3527_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/robux-prices_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-get-free-robux-easy_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_off00004da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DA4 23820 bytes
SHA-256: c2b1b9511d5ba334a0489958bdae1a16a019a6883f5518f085f1f4c46c7f8c85
font_01_sfnt_off000083b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83B7 18544 bytes
SHA-256: 676341dbefa323dbc4b946c2686838571f53b2628d6a47ca3b85ce5423840dbd