Malicious PDF — malware analysis report

Static analysis result for SHA-256 434cc647706bb73d…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 02:35:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8e8c2536e6e01a340d6291f6fa6c0797 SHA-1: ee75cfc2de650f2826b1ce91b2c417e7a1fde8f3 SHA-256: 434cc647706bb73d10eb1bbbbb346a1ebf51d9825ce5d99fbac371e20eeb595e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to malicious redirectors, specifically advertising 'free generator / game hack' lures for popular games. The primary malicious URL identified is http://netcdn.tw/app/406889139/instagram-coin-master-free-spins-game-hack, which is flagged as a known malicious redirector. The document's structure and content suggest it is designed to trick users into clicking these links, likely leading to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/406889139/instagram-coin-master-free-spins-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/hoew-to-fly-in-roblox-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coinmasterfreespinlink_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-change-name-free-pastbin_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/has-momo-hack-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/ore-tycoon-2-cheats-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-greg-hacker_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/freerubux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/tiktok-free-hong-kong_GM835599320.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/roblox-but_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/fb-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-make-cheat-engine-undetected-on-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-redeem-code_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-hack-tool-for-pc_GM406889139.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
font_00_sfnt_off000031b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B3 22820 bytes
SHA-256: 5fb054644a09675fdbb8ee9aabe2d55657887a2d1118d35b2f3b07212c6c978d
font_01_sfnt_off0000650b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x650B 18432 bytes
SHA-256: f928e4d6a2d9fea4bedfc91f8e800fe9c4f6b660539256c40350ca72eee1aae4

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