Malicious PDF — malware analysis report

Static analysis result for SHA-256 88e0a9176acbc09a…

MALICIOUS

PDF

49.6 KB Created: 2021-05-15 04:09:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8054942db41ec48ec38fc48506f60ee4 SHA-1: c7e2ac4d3693108ebcbd69aba1c3550ccd060905 SHA-256: 88e0a9176acbc09a5ff0723d40a7ea21cc6642425f111429d1a33fb1fd673f20
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document presents a fake CAPTCHA to trick the user into interacting with it, likely to initiate a download. The presence of external URIs and the ML classifier's high confidence score indicate malicious intent. The document body contains obfuscated text and URLs, suggesting it is designed to lead the user to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

Heuristics 4

  • 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
  • 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-robux-videos-game-hack
    • http://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-list_GM406889139.pdf
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-app_GM406889139.pdf
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/free-clothing-on-roblox_GM431946152.pdf
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/coin-master-free-link-2021_GM406889139.pdf
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/minecraft-client_GM479516143.pdf
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/coin-master-gold-cards-hack_GM406889139.pdf
    • http://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/dominus-roblox-free_GM431946152.pdf
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/minecraft-free-ios-no-verification_GM479516143.pdf
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/free-robux-only-username-no-human-verification_GM431946152.pdf
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/coin-master-firebird-card-free_GM406889139.pdf
    • http://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/free-robux-live_GM431946152.pdf
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/vip-roblox-free_GM431946152.pdf
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/coin-master-hack-version-download-2021-ios_GM406889139.pdf
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/best-free-roblox-executor_GM431946152.pdf
    • http://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/how-to-play-minecraft-online-for-free_GM479516143.pdf
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/free-robux-apps-that-work_GM431946152.pdf
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/coin-master-hack-mod-apk-download_GM406889139.pdf
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/coin-master-hacks-to-get-spins_GM406889139.pdf
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/free-spin-coin-master-today_GM406889139.pdf
    • https://elearning.mtsddikanang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a08.bin
df8bec7d5a712ac878aaf3be842c58879ac736847c26adcef79095053838109f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A08 25868 bytes
font_01_sfnt_off0000850e.bin
40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x850E 3884 bytes
font_02_sfnt_off000091b1.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91B1 5696 bytes
font_03_sfnt_off00009ec2.bin
1ec21ed17295e3d49cd7a507c4ef3ee968e538ae560c82d8bcc555326bed268a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EC2 18444 bytes

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