Malicious PDF — malware analysis report

Static analysis result for SHA-256 8953375549a1313e…

MALICIOUS

PDF

33.8 KB Created: 2021-07-03 11:52:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4aa7902c69d3bc2c980ecd267ae27d41 SHA-1: 594978f574d53238f2427f76dd38cdb39ca906b3 SHA-256: 8953375549a1313e8ef428207b5c0d40b06b9578d8159cdbc12597ee756b6e05
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that lead to known malicious redirectors, disguised as "free generator / game hack" lures. The primary link directs users to a site offering a "minecraft-windows-10-free-code-game-hack". The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or further stages of an 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/479516143/minecraft-windows-10-free-code-game-hack In PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-hack-download-robux-pc_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/play-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-add-mods-to-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-games-with-free-gamepasses_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-funny-funny-funny-roblox-3ds-games_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-lua-script-cheat-engine-exploit_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-robux-icu_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-colouring-in-free-download_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-100-free-spins-link_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-coin-app_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-high-school-free-rhs-cash-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-spin-card-exchange-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-jailbreak-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/does-roblox-ip-ban-for-hacking_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_off00002f86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F86 21904 bytes
SHA-256: 1fc863e34a038cf952606bb81cc27f4ccce67e8b989017a2762e05246b6eac28
font_01_sfnt_off00005f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F81 18812 bytes
SHA-256: 64384bfcc58c1bbdf03ee3f883a0be16d7cce96ae7e77f1df9d799b764379cfd