Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ee04c735cef6ea7…

MALICIOUS

PDF

43.2 KB Created: 2021-05-12 21:13:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c8c49e6bcd3bbaef1ed59e5db6dd4594 SHA-1: e637d95473a76c205e808a5be77795eb4cc59377 SHA-256: 1ee04c735cef6ea765ba27e942b3f6dccfeffe94bc799bd159a107c65f48aefe
260 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including a known malicious redirector, disguised as generators for game hacks and free items. The document body and heuristics indicate a lure for potentially unwanted content or further malicious downloads. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 6

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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 https://netcdn.xyz/app/479516143/free-minecraft-alt-generator-game-hack In PDF document text
    • http://firstaidacademy.be/images/download-coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://firstaidacademy.be/images/coin-master-free-spins-and-coins-for-iphone_GM406889139.pdfIn PDF document text
    • http://firstaidacademy.be/images/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://firstaidacademy.be/images/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://firstaidacademy.be/images/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://firstaidacademy.be/images/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://firstaidacademy.be/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://firstaidacademy.be/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://firstaidacademy.be/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://firstaidacademy.be/images/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://firstaidacademy.be/images/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://firstaidacademy.be/images/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://firstaidacademy.be/images/robux-today_GM431946152.pdfIn PDF document text
    • http://firstaidacademy.be/images/coin-master-200-spin-link_GM406889139.pdfIn PDF document text
    • http://firstaidacademy.be/images/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • http://firstaidacademy.be/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://firstaidacademy.be/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://firstaidacademy.be/images/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://firstaidacademy.be/images/free-coins_GM406889139.pdfIn PDF document text
    • http://firstaidacademy.be/images/oprewards-robux_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_off000047ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47CA 29072 bytes
SHA-256: 976be9ff5e156f33f985ae8850f2a9f74532df81d14abf5ad6b68d9d5085c5c5
font_01_sfnt_off00008840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8840 17784 bytes
SHA-256: 66ae3cfb6d310f144f42187aaa203441353bb0cc88c1a3915b2f7a14fa3c41b8

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