Malicious PDF — malware analysis report

Static analysis result for SHA-256 f986d491002de43a…

MALICIOUS

PDF

36.3 KB Created: 2021-07-05 05:51:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 98c891a3499551b9f8d2ded3745bbdb2 SHA-1: 47d9d2cef0cc44fdb4d6b690cd7d78895f929337 SHA-256: f986d491002de43aafd3cb940c28b46c01f160981e11dd8abe6a85702eca11f1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'free currency' to lure victims. The primary redirector URL is http://netcdn.tw/app/431946152/how-to-hack-peoples-roblox-accounts-game-hack, which is designed to lead users to further malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or social engineering attack aimed at driving traffic to malicious sites.

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/how-to-hack-peoples-roblox-accounts-game-hack In PDF document text
    • https://www.sonestad.se/library/repository/coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/earn-robux-websites_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/install-free-game-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/haktuts-coin-master-free-spin-link-today_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-free-exploits_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/where-can-i-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/como-generar-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/minecraft-login-free_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-get-robux-for-free-without-hacking_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/coin-master-34-4-hack-download_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/hack-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-tiktok-likes_GM835599320.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_off00003503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3503 22820 bytes
SHA-256: 59ec03a8c4a1afd55a10559810660633f05cfa12550f81f88b1ca67e99497f58
font_01_sfnt_off000067fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67FE 19392 bytes
SHA-256: 455054d53819942057d20be51cc97c11c8340df0e33a1662ffdae35838096838

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