Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cf49707528cdb82…

MALICIOUS

PDF

46.2 KB Created: 2021-05-19 12:20:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1a66bf22847c2b6c4f0f2729e44d6996 SHA-1: 6b4d185b1846401cea98afb2bd3fbf99c5421191 SHA-256: 4cf49707528cdb827779520af6875758e8935f7a8b5ba2cdb1b775426c136f76
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a prominent external URI pointing to sites offering game hacks and cheats, suggesting a lure for users to download potentially unwanted or malicious software. The ML classifier strongly flagged this PDF as malicious, and the presence of download-related lures reinforces the malicious intent. No scripts were extracted, but the document's structure and content indicate a phishing or social engineering attempt to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

Heuristics 4

  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/479516143/games-like-minecraft-but-free-game-hack
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/coin-master-free-spins-2021-no-human-verification_GM406889139.pdf
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/free-robux-not-fake_GM431946152.pdf
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/hacks-for-minecraft-bedrock_GM479516143.pdf
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdf
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/get-free-robux-without-doing-anything_GM431946152.pdf
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/roblox-mobile-hack_GM431946152.pdf
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/client-minecraft_GM479516143.pdf
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/coin-master-hack-ios_GM406889139.pdf
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/www-free-robux_GM431946152.pdf
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/how-to-hack-coin-master_GM406889139.pdf
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/coin-master-free-coins-and-spins-daily_GM406889139.pdf
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/coin-master-daily-free-spin-app_GM406889139.pdf
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/free-robux-gift-card-codes-2021_GM431946152.pdf
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/coin-master-free-spins--coins-2021_GM406889139.pdf
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/coin-master-free-spins-link-download-ios_GM406889139.pdf
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/coin-master-free-spin-and-trading_GM406889139.pdf
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/free-robux-no-download_GM431946152.pdf
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/links-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/roblox-sued_GM431946152.pdf
    • http://www.kraftyzone.com/uploaded_files/userfiles/files/how-to-hack-roblox-for-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e06.bin
89424be548a2fd6a940225be84c683c89d4fc9f52270d64e0aea3132ad3b883d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E06 26348 bytes
font_01_sfnt_off0000885e.bin
96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689		 pdf-font-stream PDF embedded font (sfnt) at offset 0x885E 2820 bytes
font_02_sfnt_off000091ff.bin
6b77667e5393daef3d5c6d964ee9e1e8f0bf8aa621da45ad5803b98c0c35dbed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91FF 18352 bytes

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