Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ca8265da74c6fd…

MALICIOUS

PDF

45.2 KB Created: 2021-06-03 09:34:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 75e3b4dde9f9f2311fe71290472fa68b SHA-1: bbe7ef5b6c011c42e002a4c7ce0090191f0281ba SHA-256: d9ca8265da74c6fd6273f38de569ebace8dda9cd9519e4503b940724b4cebaf3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a known malicious domain, masquerading as a 'free generator' for a popular game. The document body, though partially corrupted, contains references to the malicious URL and other potentially deceptive links. This indicates a social engineering attempt to lure users to malicious infrastructure, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.online/app/406889139/free-spins-generated-from-coin-master-game-hack In PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-spins-october-28-2021-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/how-to-hack-coin-master-with-root_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/what-is-a-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-robux-master_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/how-to-make-a-minecraft-bedrock-server-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-robux-no-verification-no-survey_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
stream_004_off00004fc6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FC6 27688 bytes
SHA-256: 7daaae6a0acf172fc63d8b42458627f74df1d83165ac5430c1c365be9128ea78
font_01_sfnt_off00008e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E31 18320 bytes
SHA-256: d827f104b81aaf123e8ff1599fe12972b053c6881734e5a14a739a4b5a769c82

Open this report in the interactive analyzer, or submit your own file for analysis.