Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b9b163b563b670c…

MALICIOUS

PDF

35.8 KB Created: 2021-06-25 12:39:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3453463c0d02b95e42eff2c834a952ae SHA-1: 68c8eee08547727ded54bf8ee6a68fc8431188dd SHA-256: 4b9b163b563b670cae293164ec919babb0aa9487d2fcddc28eb93947f4403a4f
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains numerous links to external resources, including one at http://netcdn.co/app/431946152/hack-confiteration-data-base-roblox-game-hack, which is likely a lure for downloading malicious content. The presence of a "download button" heuristic and the ML classifier's high confidence score indicate a malicious intent to trick users into downloading a payload. The document body and embedded URLs suggest a theme of game-related cheats and currency.

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/hack-confiteration-data-base-roblox-game-hack PDF link annotation
    • http://pustaka.ust.ac.id/repository/tshirt-adidas-for-free-roblox-of-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-400-spin-link_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/cm-daily-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/speed-city-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/ninja-legends-hack-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-online-roblox-robux-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-roblox-codes-2021-may-sunny-hollow_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-roblox-link_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-hack-injection_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off0000349a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x349A 22564 bytes
SHA-256: 3cde775d063b31f3d5aa45610aaa12feec72ac55232dc230ae7bc1e7319a677a
font_01_sfnt_off00006707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6707 19048 bytes
SHA-256: 6ff110fd1f5a20664e6f88d6c55c82da5ec50baa81375f6fdf30ff3eaa675c12

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