Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbc96504f761da64…

MALICIOUS

PDF

48.2 KB Created: 2021-05-19 08:47:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 83228e9f1b97a72b0ec29d392bacf665 SHA-1: 9ed36a2540bd359b6c0376890f75acff804948c7 SHA-256: bbc96504f761da6469c25e7214062fa3e07c7dea9dd69742d48e09d46e36c381
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links and a visual call-to-action button, directing users to a URL associated with free Robux. This heuristic firing, combined with the ML classifier's high confidence, indicates a likely phishing or scam attempt. The document body text and embedded URLs suggest a lure for in-game currency or hacks, a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.xyz/app/431946152/robloxhero.xyz-free-robux-game-hack In PDF document text
    • http://zarinnameh.ir/images/coin-master-get-free-spins_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://zarinnameh.ir/images/coin-master-free_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/coin-master-hack-download_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://zarinnameh.ir/images/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://zarinnameh.ir/images/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://zarinnameh.ir/images/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://zarinnameh.ir/images/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a29.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A29 26420 bytes
SHA-256: 6e2a3545869a359d625e72f648b54bd3c83126b29712d065db7dd55abee0d949
font_01_sfnt_off000086de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86DE 7604 bytes
SHA-256: 4d0577db3c3aeab666651caa6151abd460b56b8fc50461bbcc2424449532bd09
font_02_sfnt_off0000994c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x994C 18584 bytes
SHA-256: d96645d743d7bc7e16305d404e9ae036d13b2ec1544ce4a3e073a2af54c3cd1e

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