Malicious PDF — malware analysis report

Static analysis result for SHA-256 85d3e840ce92c60f…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 01:22:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b7cacbe51b3ddfad0aa76df95c76e56d SHA-1: 070c96b0eb71e125eed477aab5ba0f3250936d4e SHA-256: 85d3e840ce92c60f7625984a7fe13bf30f73acb8a7be722a3497f20e3cac4f22
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and websites offering game hacks and free currency, such as 'free-robux-by-watching-ads-game-hack'. These links are designed to lure users into downloading further malicious content or visiting phishing sites. The ML classifier also strongly indicated maliciousness.

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/free-robux-by-watching-ads-game-hack In PDF document text
    • http://suaedy-library.net/repository/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-be-a-real-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/hack-asasin-roblox-aimbot_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-get-free-roblox-money-2021_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-complete-free-hack_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/picture-of-people-hacking-roblox_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-roblox-codes-not-used_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/roblox-hack-2021-android_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/roblox-script-speed-hack-v3rmillion_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-hack-the-games-of-roblox-to-have-visits_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-get-free-animations-on-roblox_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-roblox-promo-codes_GM431946152.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_off00002f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F7A 21616 bytes
SHA-256: 4bb7bff2e29dc3bc315020994ea62d4efdd624ee88611411fb0d01827db11280
font_01_sfnt_off00005ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE1 19660 bytes
SHA-256: f0cdf6166c464805662a9cde01402bcc449eb6222422d9d5af766ad530424c87