Malicious PDF — malware analysis report

Static analysis result for SHA-256 80b19b8123888b58…

MALICIOUS

PDF

45.4 KB Created: 2021-06-11 03:07:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: dddd62bc9701a660de5973b5dc05cfeb SHA-1: 29ceb8d62fbfdd7db1756c39e661ac8af97ff041 SHA-256: 80b19b8123888b589d8968810dd623703113c0f460b7ba25584e0a5f0c14be8e
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF links, suggesting a link farm or content farm designed to attract traffic. The document body and extracted URLs indicate a focus on 'free Robux' and game hacks, a common lure for phishing and scam attempts. The heuristic 'SE_SECURITY_BYPASS' suggests the document may also contain instructions to disable security software, further indicating malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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-how-to-get-free-robux-game-hack
    • http://pustaka-smpn3tpi.com/repository/coin-master-twitter-free-spins_GM406889139.pdf
    • http://pustaka-smpn3tpi.com//repository/coin-master-link-daily-get-free-spins-amp_GM406889139.pdf
    • http://pustaka-smpn3tpi.com//repository/how-to-make-a-minecraft-bedrock-server-for-free_GM479516143.pdf
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-ios-2021_GM406889139.pdf
    • http://pustaka-smpn3tpi.com//repository/coin-master-card-link-free_GM406889139.pdf
    • http://pustaka-smpn3tpi.com/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdf
    • http://pustaka-smpn3tpi.com/repository/free-robux-generator-codes_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/meney-hack-jailbreak-roblox_GM431946152.pdf
    • http://pustaka-smpn3tpi.com//repository/win-free-robux_GM431946152.pdf
    • http://pustaka-smpn3tpi.com//repository/free-robux-without-downloading-apps_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdf
    • http://pustaka-smpn3tpi.com//repository/coin-master-hack-pc-2021_GM406889139.pdf
    • http://pustaka-smpn3tpi.com//repository/coin-master-hack-game-download-mod-apk_GM406889139.pdf
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-pc-download_GM406889139.pdf
    • http://pustaka-smpn3tpi.com/repository/coin-master-free-spins-link-2021-app_GM406889139.pdf
    • http://pustaka-smpn3tpi.com//repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdf
    • http://pustaka-smpn3tpi.com/repository/hack-version-coin-master-apk_GM406889139.pdf
    • http://pustaka-smpn3tpi.com/repository/roblox-games-free_GM431946152.pdf
    • http://pustaka-smpn3tpi.com//repository/free-spins-coin-master-no-verification_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000505a.bin
0183b4c3a3679c1931035e910ae7d9f1b1a746eb5273b5421bc5c50ae2f9204d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x505A 27496 bytes
font_01_sfnt_off00008ecf.bin
2eeeedfcb2f224ab556fa0ab031baeab03f86dcbcf90e3baaaf5b6d88536dec3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8ECF 18280 bytes

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