Malicious PDF — malware analysis report

Static analysis result for SHA-256 b96bf6c2ca2ff824…

MALICIOUS

PDF

46.0 KB Created: 2021-05-19 15:35:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0d9ed18777dfa2d16ab1a76e6d51cd9c SHA-1: 0b1d13abc23b026b702e2e12b1de8b513b90cccb SHA-256: b96bf6c2ca2ff82450208bbc15403f8776b7a834a39d261cd8c97275a75032aa
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a visual call-to-action, strongly suggesting a phishing or scam attempt. The primary URL points to a site offering 'Coin Master Free Spins', a common lure for such schemes. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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 https://netcdn.xyz/app/406889139/coin-master-free-spins-link-blogspot-game-hack
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/how-to-get-free-robux-with-no-verification_GM431946152.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/free-roblox-hair-boy_GM431946152.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/http-bit-ly-coin-master-hack_GM406889139.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/free-robux-no-human-verification-no-survey_GM431946152.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/win-free-robux_GM431946152.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/free-robux-codes-generator-no-verification_GM431946152.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/free-robux-link_GM431946152.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/mosttechs-coin-master-free-spins_GM406889139.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/claim-free-robux_GM431946152.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/lastrick-com-coin-master-hack_GM406889139.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/coin-master-hack-apk-latest-version-2021_GM406889139.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/free-robux-download_GM431946152.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/mine-minecraft-games-for-free_GM479516143.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/windows-10-minecraft-free-with-java_GM479516143.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/facebook-coin-master_GM406889139.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/coin-master-hack-app-download-free_GM406889139.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/coin-master-free-stuff_GM406889139.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/spins-coin-master_GM406889139.pdf
    • http://www.r2rfurniture.com/uploaded_files/userfiles/files/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e8e.bin
81695ec0db16215f35c243f2a5a9eb9e7044a22cb634fc1d750b20e7880edd59		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E8E 24556 bytes
font_01_sfnt_off000086a1.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86A1 2840 bytes
font_02_sfnt_off00009052.bin
bdbf3986ec68ee3b496ae89412d1d0f392e3b826f1ca321ec58289079c9e4546		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9052 18632 bytes

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