Malicious PDF — malware analysis report

Static analysis result for SHA-256 294f32fab0f6ff65…

MALICIOUS

PDF

46.5 KB Created: 2021-06-09 10:40:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4efa6ed0b56aecbbf6ee043aa10109fc SHA-1: 3d0968bf9606487bab964d54dce015f29f48c1be SHA-256: 294f32fab0f6ff65bb4b6bd41cf24da22fe1712a43dd1ce4f567ce98ef3d0f7e
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 users into interacting with it, which is a common social engineering tactic. It contains multiple embedded URLs, one of which is associated with a malicious ML classifier flag. The document's content and structure suggest it is designed to lead the user to download further malicious content or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/how-to-get-anything-on-roblox-for-free-easy-2021-game-hack PDF link annotation
    • http://library.smpn2-byl.sch.id//repository/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/hack-xp-net-generators-coin-master_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/robux-free-no-vertifacation_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/free-codes-for-toys-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/play-coin-master-online-free_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/free-inferno-box-in-miners-heaven-roblox_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-hack-version-download-2021-android_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ff8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FF8 28332 bytes
SHA-256: 3818f2ab837ced825697b06e445b26af47803e011d69f16f049ed135708cf467
font_01_sfnt_off00008f0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F0A 19600 bytes
SHA-256: 11ee0ed444f982c23ba63dd08b464192ce1cdc243cca5b0df937b17fdd3052bc

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