Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b40b1e82c0db7e7…

MALICIOUS

PDF

42.0 KB Created: 2021-05-16 14:02:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 736316ee02022085e688e26f872b466b SHA-1: 6e3887343c25866dbcf92d31067a5be81d3f4614 SHA-256: 9b40b1e82c0db7e7ff701f74b4689758db259e8ed316231f241a22b51a08b812
82 Risk Score

Malware Insights

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

The document displays a fake CAPTCHA or verification prompt, a common lure to trick users into clicking malicious links. The embedded URL and numerous other URLs point to sites offering game hacks and cheats, reinforcing the social engineering pretext. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/ways-to-get-free-robux-game-hack PDF link annotation
    • http://bilhetim.com.br/images/coin-master-33-hack-version-download_GM406889139.pdfIn PDF document text
    • http://bilhetim.com.br/images/coin-master-hack-355_GM406889139.pdfIn PDF document text
    • http://bilhetim.com.br/images/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://bilhetim.com.br/images/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://bilhetim.com.br/images/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://bilhetim.com.br/images/is-minecraft-free-on-computer_GM479516143.pdfIn PDF document text
    • http://bilhetim.com.br/images/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://bilhetim.com.br/images/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://bilhetim.com.br/images/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://bilhetim.com.br/images/coin-master-link-spin_GM406889139.pdfIn PDF document text
    • http://bilhetim.com.br/images/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • http://bilhetim.com.br/images/coin-master-village-4_GM406889139.pdfIn PDF document text
    • http://bilhetim.com.br/images/coin-master-hack-tool-exe_GM406889139.pdfIn PDF document text
    • http://bilhetim.com.br/images/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://bilhetim.com.br/images/coin-master-free-spin-trick_GM406889139.pdfIn PDF document text
    • http://bilhetim.com.br/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://bilhetim.com.br/images/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://bilhetim.com.br/images/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • http://bilhetim.com.br/images/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://bilhetim.com.br/images/coinmaster-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000483b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x483B 24744 bytes
SHA-256: ee8d8744eb9616714cee1801fb0319fa5f6fd07599adb9b62084aa1f25851e85
font_01_sfnt_off0000806a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x806A 18724 bytes
SHA-256: b2cd5ec598a8c260812e966e9710fb38f03066217a6d0ec8f431d8a9dca8af42

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