Malicious PDF — malware analysis report

Static analysis result for SHA-256 44f465dd650ab2eb…

MALICIOUS

PDF

48.4 KB Created: 2021-05-17 13:19:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 760f6c1875b06e298fa49771dd47b7e4 SHA-1: cb0ee86a8e89b8418827110935f2ea13e69e8815 SHA-256: 44f465dd650ab2eba83d1621eae9a424b101190d8b582b8d0f792026a18bd434
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or verification prompt to trick the user into interacting with it, as indicated by the 'SE_FAKE_CAPTCHA' heuristic. It also contains an embedded URI pointing to a suspicious URL, likely intended to lead the user to a scam or download a secondary payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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/406889139/coin-master-free-spins-link-2021-download-game-hack
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/get-free-spins-for-coin-master_GM406889139.pdf
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/free-spins-coin-master-blogspot_GM406889139.pdf
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/free-coin-master-spins-blog_GM406889139.pdf
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/robux-free-co_GM431946152.pdf
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/apps-for-free-robux_GM431946152.pdf
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-games_GM431946152.pdf
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/free-coins-2021-coin-master-link_GM406889139.pdf
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdf
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/hack-xp-net-generators-coin-master_GM406889139.pdf
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/windows-10-minecraft-hacks_GM479516143.pdf
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-com_GM431946152.pdf
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/minecraft-story-mode-free_GM479516143.pdf
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/free-money-links-coin-master_GM406889139.pdf
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/get-me-free-robux_GM431946152.pdf
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/coin-master-free-coins-link_GM406889139.pdf
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-download_GM406889139.pdf
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/spin-coin-master_GM406889139.pdf
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/oginject-co_GM406889139.pdf
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/coin-master-rare-cards-hack_GM406889139.pdf
    • https://elearning.mtsn2-bondowoso.sch.id/__statics/gudangsoal/files/free-coin-master-cards_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d22.bin
9d29b9f071e252f9c9a934e27f875e7414c0ea495265cf0f4a161a123daef028		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D22 29956 bytes
font_01_sfnt_off00008e0b.bin
e0f8480fa6793c91ec869da5acb64ee4c254eeaf21d467085c584c7dc5eb632a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E0B 19036 bytes
font_02_sfnt_off0000b278.bin
e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB278 3264 bytes

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