Malicious PDF — malware analysis report

Static analysis result for SHA-256 d839c9c18503bceb…

MALICIOUS

PDF

53.9 KB Created: 2021-05-14 02:05:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 01ed59891f821c3bea41e19dd2cf4176 SHA-1: 5b7f9b87d0e876a2aa355cdbdfe7f03312e530d2 SHA-256: d839c9c18503bcebd43c77a58a8ef19ca8f0e1c5122396f3764d6a1b12c4cc84
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure to trick users into interacting with a malicious link. The embedded URL and numerous other URLs point to sites offering 'free robux' or game hacks, suggesting a social engineering tactic to drive traffic to potentially malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9365

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-website-game-hack
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/robux-today_GM431946152.pdf
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/free-robux-hack-generator_GM431946152.pdf
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdf
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/are-minecraft-realms-free_GM479516143.pdf
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/coinmaster-hack_GM406889139.pdf
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/roblox-free-items_GM431946152.pdf
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/i-want-free-robux_GM431946152.pdf
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/minecraft-hacks-xbox_GM479516143.pdf
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/coin-master-hack-fast_GM406889139.pdf
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/how-to-win-robux_GM431946152.pdf
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdf
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/minecraft-free-download-mobile_GM479516143.pdf
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-phone_GM431946152.pdf
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/how-to-give-robux-on-mobile_GM431946152.pdf
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/free-roblox-executor-no-key_GM431946152.pdf
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/coin-master-free-spin-app-apk_GM406889139.pdf
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/coin-free-master_GM406889139.pdf
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/coin-master-hack-no-human-verification_GM406889139.pdf
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/cheat-codes-for-coin-master_GM406889139.pdf
    • http://elearning.mtsn3po.sch.id/__statics/gudangsoal/files/free-minecraft-skins-pc_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cce.bin
0ed90ef6eaab112c0dd4d50d1e8932c7d996775041ec4734a871524e873065b0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CCE 38996 bytes
font_01_sfnt_off0000a38c.bin
9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA38C 5596 bytes
font_02_sfnt_off0000b034.bin
681a9996b59f8391b7cc91011c49ef4e68754eb5dc3ad8da1029f3e9c8ab03b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB034 18436 bytes

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