Malicious PDF — malware analysis report

Static analysis result for SHA-256 458934b057aa8f3a…

MALICIOUS

PDF

43.6 KB Created: 2021-06-09 03:51:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e3caf87dba6d8630364dfb055ac8d034 SHA-1: 0b9f89ef1720e300f1c9a68114f3e4f4ca0ec396 SHA-256: 458934b057aa8f3a8d2c19f9c626f40118b610c104cee05cc32c790cb95fabdc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure, aiming to trick users into interacting with malicious content. It embeds external URIs pointing to potentially malicious websites, suggesting a phishing or scam attempt. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • 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
  • 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/roblox-hack-konsol-game-hack PDF link annotation
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-home_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/card-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/pokemon-go-hack-free-download-ios_GM1094591345.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-fan_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-private-server-roblox_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
stream_004_off00004d0c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D0C 25916 bytes
SHA-256: bee08add7bf44986f9f27517d801c0e952de4c3e3033151fcfb9b914b785f973
font_01_sfnt_off000087f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87F4 18184 bytes
SHA-256: 6ae3e46ea54a702b71f75c4975cfb90f4f2603171767de2f1573df233dda87d6

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