Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9b53f5e65dbf290…

MALICIOUS

PDF

41.5 KB Created: 2021-05-14 10:32:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d789a4bf4cd464589e957421d237338f SHA-1: acb4b6fad07fff226c77f9754efd3dd3d8b86283 SHA-256: c9b53f5e65dbf290f712e164067e214fed6a8eeb33c49ffe7c1d14d3e7a1cda1
70 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs and a raw IP address pointing to resources that promise free in-game currency, likely a lure for users to download further malicious content. The ML classifier strongly indicated maliciousness, and the document body, though obfuscated, contains references to URLs and download prompts. The presence of external URIs and the ML classification suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.xyz/app/431946152/earnrobux-game-hack
    • http://103.19.59.42/__statics/gudangsoal/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdf
    • http://103.19.59.42/__statics/gudangsoal/files/how-to-get-free-robux-without-verification_GM431946152.pdf
    • http://103.19.59.42/__statics/gudangsoal/files/blox-rewards_GM431946152.pdf
    • http://103.19.59.42/__statics/gudangsoal/files/coin-master-hack-2021_GM406889139.pdf
    • http://103.19.59.42/__statics/gudangsoal/files/free-robux-mod_GM431946152.pdf
    • http://103.19.59.42/__statics/gudangsoal/files/fb-coin-master_GM406889139.pdf
    • http://103.19.59.42/__statics/gudangsoal/files/games-that-give-you-free-robux_GM431946152.pdf
    • http://103.19.59.42/__statics/gudangsoal/files/is-there-a-way-to-get-free-robux_GM431946152.pdf
    • http://103.19.59.42/__statics/gudangsoal/files/coin-master-hack-apk_GM406889139.pdf
    • http://103.19.59.42/__statics/gudangsoal/files/coin-master-free-spin-app-reviews_GM406889139.pdf
    • http://103.19.59.42/__statics/gudangsoal/files/pig-master-coin-master-free-spin_GM406889139.pdf
    • http://103.19.59.42/__statics/gudangsoal/files/coin-master-free-spin-trick_GM406889139.pdf
    • http://103.19.59.42/__statics/gudangsoal/files/my-minecraft-account-was-hacked_GM479516143.pdf
    • http://103.19.59.42/__statics/gudangsoal/files/free-robux-app_GM431946152.pdf
    • http://103.19.59.42/__statics/gudangsoal/files/how-to-hack-to-get-robux_GM431946152.pdf
    • http://103.19.59.42/__statics/gudangsoal/files/code-free-robux_GM431946152.pdf
    • http://103.19.59.42/__statics/gudangsoal/files/rbx-sites_GM431946152.pdf
    • http://103.19.59.42/__statics/gudangsoal/files/free-spins-for-coin-master-2021_GM406889139.pdf
    • http://103.19.59.42/__statics/gudangsoal/files/coin-master-game-for-pc-free-download_GM406889139.pdf
    • http://103.19.59.42/__statics/gudangsoal/files/free-spin-coin-master-link-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047df.bin
03237e8c4776790985a2923ff00a2fb9ebea3ff2eced80e8a2ae865628fb0b45		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47DF 24420 bytes
font_01_sfnt_off00008024.bin
2721194a66b32dfdaea4e26ed0bd84b304de41eeda81871a4ffc347c5a8adb25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8024 18076 bytes

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