Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3bc333048397d34…

MALICIOUS

PDF

47.4 KB Created: 2021-06-03 11:56:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1656113e95f185c33e52f8bd261c9f94 SHA-1: 2465bcb19db4c6df004c62e115adfbe316cf26a9 SHA-256: c3bc333048397d34cceadc923cad2b91b22cb8e78a1b12c1a953ba6affb673d3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains embedded URLs and a call-to-action lure, suggesting it is designed to trick users into downloading malicious content. The heuristic for password-protected archives indicates a common technique to bypass security filters. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score point towards a malicious intent, likely a downloader or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.online/app/479516143/free-minecraft-alt-accounts-game-hack
    • http://library.persadabunda.ac.id/repository/how-to-get-minecraft-for-free-ios_GM479516143.pdf
    • http://library.persadabunda.ac.id/repository/roblox-free-pets_GM431946152.pdf
    • http://library.persadabunda.ac.id/repository/free-tiktok-likes_GM835599320.pdf
    • http://library.persadabunda.ac.id/repository/static-moonactive-net-free-spins-coin-master_GM406889139.pdf
    • http://library.persadabunda.ac.id/repository/how-to-hack-someones-minecraft-account_GM479516143.pdf
    • http://library.persadabunda.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://library.persadabunda.ac.id/repository/free-stuff-on-roblox-2021_GM431946152.pdf
    • http://library.persadabunda.ac.id/repository/minecraft-build-hacks_GM479516143.pdf
    • http://library.persadabunda.ac.id/repository/how-to-get-free-robux-easy-hack_GM431946152.pdf
    • http://library.persadabunda.ac.id/repository/coin-master-34-6-hack_GM406889139.pdf
    • http://library.persadabunda.ac.id/repository/free-robux-no-verification-2021-android_GM431946152.pdf
    • http://library.persadabunda.ac.id/repository/coin-master-free-spins-cheat_GM406889139.pdf
    • http://library.persadabunda.ac.id/repository/how-to-get-free-robux-easy-on-phone_GM431946152.pdf
    • http://library.persadabunda.ac.id/repository/free-robux-pastebin_GM431946152.pdf
    • http://library.persadabunda.ac.id/repository/cm-free-spin-link-today_GM406889139.pdf
    • http://library.persadabunda.ac.id/repository/coin-master-haktuts_GM406889139.pdf
    • http://library.persadabunda.ac.id/repository/coin-master-free-spin-codes_GM406889139.pdf
    • http://library.persadabunda.ac.id/repository/robux-generator-without-verification_GM431946152.pdf
    • http://library.persadabunda.ac.id/repository/25-free-spins-coin-master_GM406889139.pdf
    • http://library.persadabunda.ac.id/repository/minecraft-coins-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000573a.bin
7ddbd173745413001642cc3d36be96241bc336ac18b4c6622cbf083b350b8654		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x573A 28756 bytes
font_01_sfnt_off00009830.bin
ca2704b96dad28857c40796bc5f3f160f1252a4638d6e656e043cddf4ab01458		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9830 17924 bytes

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