Malicious PDF — malware analysis report

Static analysis result for SHA-256 e69fc809d5429a4d…

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 14:33:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4873433bac082daec94d1b9a89588c22 SHA-1: 72024daaf7a02c1739fcc9e0201da4beff97156d SHA-256: e69fc809d5429a4ddad998c25fc1992e3409027ecefbfed9cb55fcc29a9fe56d
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links and text promoting 'Free Robux' and game hacks, strongly suggesting a lure for phishing or malware downloads. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of generated links, and the ML classifier flagged it as highly malicious. The primary IOC is the external URL http://netcdn.tw/app/431946152/free-robux-no-scam-game-hack, which is likely the destination for the malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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 http://netcdn.tw/app/431946152/free-robux-no-scam-game-hack
    • https://i-tech.ac.id/perpus/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/tiktok-minecraft-hacks_GM479516143.pdf
    • https://i-tech.ac.id/perpus/repository/free-draw-roblox-kicked-error-247_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/how-to-hack-roblox-on-skywars_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/how-do-you-get-robux-on-roblox-for-free-2021_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/free-robux-promo-codes-2021-june_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/free-robux-with-inspect-element-2021_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/free-roblox-gift-card-code-generator-no-survey_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/a-group-that-give-u-free-robux_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/free-robux-games-on-the-top-page_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/free-play-roblox-login-online_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/the-only-working-way-to-get-free-robux_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/how-to-have-a-cool-roblox-avatar-for-free_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/free-tiktok-accounts-and-passwords_GM835599320.pdf
    • https://i-tech.ac.id/perpus/repository/free-roblox-accesories_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/roblox-tatoo-free_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/hackeando-los-ordenadores-en-roblox-derank_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/how-to-cheat-in-roblox-prison-life_GM431946152.pdf
    • https://i-tech.ac.id/perpus/repository/descargar-roblox-hackeado_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030a7.bin
eaacded5bc9ef6eba55b4f514f7f2ddea691002699cf11b40e69212a9f346e11
pdf-font-stream PDF embedded font (sfnt) at offset 0x30A7 22952 bytes
font_01_sfnt_off00006433.bin
23e221c5b5bcf2e3198359e0ed97b75398f02e20f829eab4584d68e40cba0ed0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6433 18976 bytes