Malicious PDF — malware analysis report

Static analysis result for SHA-256 e11765d4a95563cc…

MALICIOUS

PDF

36.3 KB Created: 2021-07-05 07:44:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e7a40354c3c58ff4e832badc5026b066 SHA-1: 5d8ac4ef73ed4d17cc884853e438f54b6e3604a2 SHA-256: e11765d4a95563cc6d0c3d2299066fc1798f83a6a41d73504aa655185f518e74
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures. The primary malicious URL identified is http://netcdn.tw/app/479516143/free-minecraft-skins-xbox-one-game-hack. This indicates a phishing or scam attempt designed to trick users into visiting potentially harmful sites. No scripts were extracted, but the embedded URLs and the nature of the lures strongly suggest a social engineering 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/free-minecraft-skins-xbox-one-game-hack In PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-hack-client-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-tiktok-bots_GM835599320.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-roblox-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-account-hacked-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-songs-mp3_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spins-link-hack_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-in-a-game-no-password_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/robux-hack-download-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/bee-swarm-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblub-for-free-on-roblox-100-working-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-clothes-roblox-catalog_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-hacked-on-march-18_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/como-tener-robux-gratis-con-hacks_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-prison-life-hacks-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-free-games-no-download_GM479516143.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_off00003712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3712 22820 bytes
SHA-256: 9e0798a0d967ce719477e556a77d0514245c6bf6681052140dfa1759a0fea9bb
font_01_sfnt_off00006a04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A04 18764 bytes
SHA-256: eb610aa1503b7a944f791f17a5e0f1d251ece699be101169bc2854c635750f4e

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