Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb21073f2d56d93d…

MALICIOUS

PDF

36.6 KB Created: 2021-07-05 07:14:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 1333710150c5cef95c75397319e2ffc2 SHA-1: 0b72e009903810cf1a13373abbf90b742c647887 SHA-256: cb21073f2d56d93d0f9d25de40454d9fab1508c99d64f3dfa64791c02879dc74
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and potentially malicious PDF files, masquerading as game-related cheats or generators. The primary lure appears to be related to Roblox and other popular games, aiming to trick users into clicking through to malicious infrastructure. No scripts were extracted, but the embedded links and heuristic firings strongly indicate a phishing or redirection attack.

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/431946152/roblox-heroes-online-game-hack In PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/free-ninja-animation-roblox-robuxian_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/coin-master-free-food-for-pet_GM406889139.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/roblox-jailbreak-hack-money-cheat-engine_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/roblox-e-free_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/free-robux-codes-2021-live_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/robuxmatchcon_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/does-roblox-good-at-detecting-hacks_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/free-robux-no-password-or-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.lingkungan.ft.unand.ac.id/repository/coin-master-free-spins-2021-haktuts_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_off0000374b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x374B 23236 bytes
SHA-256: c46966fb75b8f5df7e0b280af6c082fe6b678f40f9cf39e0615cd18b7a61259b
font_01_sfnt_off00006bae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BAE 18608 bytes
SHA-256: 5bcc181662f876a0ec27a1a0695994c56ab33d09e860c554124bd06b45b0d474

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