Malicious PDF — malware analysis report

Static analysis result for SHA-256 813062946d61d469…

MALICIOUS

PDF

44.5 KB Created: 2021-05-16 00:05:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 53cf24307be787dc0f3a08136534e52c SHA-1: 4a8990fe12c581ab886a4c6a6c88816483edb72d SHA-256: 813062946d61d469dd2f4c4a22c11a2a9e83c75bd3ec89ac137d18829eaa70b4
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample is a PDF that displays a fake CAPTCHA lure to trick users into clicking a link. This link, such as 'https://netcdn.xyz/app/431946152/free-roblox-accounts-that-work-game-hack', likely leads to the download of a second-stage payload. The document also contains urgency language, further encouraging user interaction with the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/free-roblox-accounts-that-work-game-hack
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/coinmaster-spin-ml-link_GM406889139.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/free-minecraft-education-edition_GM479516143.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/minecraft-free-apk_GM479516143.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master-2021_GM406889139.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/hack-coin-master-mod-apk_GM406889139.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/free-robux-2021_GM431946152.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/roblox-hack-generator_GM431946152.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-hack-software_GM406889139.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-hack-ios-download-2021_GM406889139.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/get-free-spins-coin-master-link_GM406889139.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-free-spins-cheat_GM406889139.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-free-spin-daily-link_GM406889139.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/free-coins-coin-master-2021_GM406889139.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/free-multiplayer-minecraft-server_GM479516143.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/minecraft-pe-016-0-apk-download-free_GM479516143.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/minecraft-online-free-no-download_GM479516143.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/is-there-any-way-to-get-free-robux_GM431946152.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/coin-master-bonus_GM406889139.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/minecraft-free-download-unblocked_GM479516143.pdf
    • https://elearning.mtsn1tasikmalaya.sch.id/__statics/gudangsoal/files/free-robux-without-verification-or-survey_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bb3.bin
7e030a440de00d73e1c43c2bc8129c4ccbf6b196ef544f92729b5acf66d32ca1		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BB3 27140 bytes
font_01_sfnt_off000089db.bin
5a520a129cd8904d435b2c3265355279d09350e58b7119a0e5602aa69de64cf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89DB 18952 bytes

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