Malicious PDF — malware analysis report

Static analysis result for SHA-256 da3bf64d56d6527c…

MALICIOUS

PDF

46.2 KB Created: 2021-05-17 05:19:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a894b74cc9900a976cc1a312e434b0e8 SHA-1: 54db16ca95495fadd7279a48f6b070ca33aaf0e5 SHA-256: da3bf64d56d6527cd7fa524bc3a53b918e3701c7abefa929e765dd5987bafee3
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure to trick users into clicking a link, which is a common social engineering tactic. The embedded URL, https://netcdn.xyz/app/406889139/hack-to-protect-village-on-coin-master-game-hack, likely leads to a second-stage payload download. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/hack-to-protect-village-on-coin-master-game-hack PDF link annotation
    • http://boliviagasenergia.com/images/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/coin-master-hack-apk-app_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/how-to-hack-coin-master-in-pc_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/minecraft-hax-download-no-virus_GM479516143.pdfIn PDF document text
    • http://boliviagasenergia.com/images/coin-master-free_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/kachifpro_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/coin-master-hacksco_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/spinuri-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
    • http://boliviagasenergia.com/images/coin-master-free-spons-apk-2021_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d11.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D11 25656 bytes
SHA-256: 486973722df16e7ec5f240807a1ffa3cc3c8524e83c5e519a736f7e4d0a06b7c
font_01_sfnt_off00008841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8841 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000091f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91F3 18368 bytes
SHA-256: d6679102133a2002bfb5d521323467f00363df482f5150c6da4fdb9b85ad9332

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