Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce22713df999a801…

MALICIOUS

PDF

44.7 KB Created: 2021-05-13 07:32:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5b2e11d28c66ac07719f52232cd6afb6 SHA-1: 50a7e7ab81ae10db9e28623b28b10b2ebdcb299c SHA-256: ce22713df999a801261be1d972ef70a7638efb9b35b67ff3eadabe5fb8c307b4
82 Risk Score

Malware Insights

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

The PDF document presents a fake CAPTCHA lure to trick users into clicking a link, likely to download a second-stage payload or redirect to a phishing site. The embedded URL `https://netcdn.xyz/app/431946152/free-robux-link-game-hack` is the primary indicator of this malicious intent. While no scripts were explicitly extracted, the PDF structure and heuristics suggest an attempt to exploit user interaction for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-link-game-hack
    • http://minurispenjaringan.sch.id/__statics/gudangsoal/files/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdf
    • http://minurispenjaringan.sch.id/__statics/gudangsoal/files/blogger-coin-master-free-spins_GM406889139.pdf
    • http://minurispenjaringan.sch.id/__statics/gudangsoal/files/coin-master-free-spin-2912-2021_GM406889139.pdf
    • http://minurispenjaringan.sch.id/__statics/gudangsoal/files/can-you-earn-robux_GM431946152.pdf
    • http://minurispenjaringan.sch.id/__statics/gudangsoal/files/free-minecraft-addons_GM479516143.pdf
    • http://minurispenjaringan.sch.id/__statics/gudangsoal/files/coin-master-free-cards_GM406889139.pdf
    • http://minurispenjaringan.sch.id/__statics/gudangsoal/files/coin-master-400-spin-link-hack_GM406889139.pdf
    • http://minurispenjaringan.sch.id/__statics/gudangsoal/files/woman-roblox_GM431946152.pdf
    • http://minurispenjaringan.sch.id/__statics/gudangsoal/files/coin-master-rewards-free-spins_GM406889139.pdf
    • http://minurispenjaringan.sch.id/__statics/gudangsoal/files/legitimate-coin-master-free-spins-apk_GM406889139.pdf
    • http://minurispenjaringan.sch.id/__statics/gudangsoal/files/coin-master-hack-link-2021_GM406889139.pdf
    • http://minurispenjaringan.sch.id/__statics/gudangsoal/files/free-coin-and-spin-link_GM406889139.pdf
    • http://minurispenjaringan.sch.id/__statics/gudangsoal/files/coin-master-free-spin-download_GM406889139.pdf
    • http://minurispenjaringan.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-android_GM406889139.pdf
    • http://minurispenjaringan.sch.id/__statics/gudangsoal/files/robloxheroxyz-free-robux_GM431946152.pdf
    • http://minurispenjaringan.sch.id/__statics/gudangsoal/files/roblox-piano-hack_GM431946152.pdf
    • http://minurispenjaringan.sch.id/__statics/gudangsoal/files/how-to-get-free-minecraft-skins_GM479516143.pdf
    • http://minurispenjaringan.sch.id/__statics/gudangsoal/files/coin-master-deals_GM406889139.pdf
    • http://minurispenjaringan.sch.id/__statics/gudangsoal/files/coin-master-hack-spins-2021_GM406889139.pdf
    • http://minurispenjaringan.sch.id/__statics/gudangsoal/files/free-robux-without-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c3b.bin
86834a5ca13030e457a546f0616e17f824e1460e4fb262d38b8aea58248a5467		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C3B 28040 bytes
font_01_sfnt_off00008ca6.bin
a4aae99c46e0a0f586669c3aecb8c0d6e5f23962dc49b2f1654f133382ac5317		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA6 18304 bytes

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