Malicious PDF — malware analysis report

Static analysis result for SHA-256 10c8d4e65e88c779…

MALICIOUS

PDF

45.5 KB Created: 2021-05-16 22:46:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4a5955874147b3bb43cc90f6acaa5fbd SHA-1: aa9528156b46e2524f64bd0eee754e195b5dfd11 SHA-256: 10c8d4e65e88c77997328ed801ae751a1277c300f728405e0141ff39fd67f029
162 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are structured as SEO-optimized links for game hacks and cheats. The document also includes a lure instructing users to copy/paste content into a command-line context, suggesting an attempt to trick users into executing malicious commands. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/minecraft-wurst-client-game-hack
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/coin-master-mod_GM406889139.pdf
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/how-to-get-800-robux-for-free_GM431946152.pdf
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/free-spins-coin-master-no-verification_GM406889139.pdf
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/100-hack-coin-master_GM406889139.pdf
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/get-free-robux-no-verification_GM431946152.pdf
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/coin-master-hack-download-apk_GM406889139.pdf
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/como-hackear-juego-coin-master_GM406889139.pdf
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/coin-master-game-hack-online_GM406889139.pdf
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/coin-master-hack-no-verification_GM406889139.pdf
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/free-robux-meme_GM431946152.pdf
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/buy-robux-free_GM431946152.pdf
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/how-to-hack-to-get-robux_GM431946152.pdf
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdf
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-on-flip-master_GM406889139.pdf
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdf
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdf
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/www-robux-redeem_GM431946152.pdf
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/roblox-prison-life-hack_GM431946152.pdf
    • https://man1kotasmi.sch.id/__statics/gudangsoal/files/how-to-get-free-premium-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ca7.bin
9569b97d6333e5293beba768122210b4bbcd0e5e0ea56cd3324c04149e63e235		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CA7 25944 bytes
font_01_sfnt_off0000867d.bin
8c5d9bcb386d88c7f99323d8d482e46ea21dea038a5b842744dd5d39b26b2c44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x867D 2856 bytes
font_02_sfnt_off00009054.bin
da8de394074f4ca1a4d818326f6763942cae13e643f91f1376333b749e0c27ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9054 17980 bytes

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