Malicious PDF — malware analysis report

Static analysis result for SHA-256 43a9891db17f5b7d…

MALICIOUS

PDF

35.2 KB Created: 2021-06-29 07:19:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 355f4e4d5f598972da5dbecac2bd633e SHA-1: c10bd1c08dc54572fb7ccb11f2476210f29ea336 SHA-256: 43a9891db17f5b7da898fd164eac1327b7bf3781be8bfe6fd1e8c2ca735d4ddf
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.co/app/431946152/roblox-hack-no-verification-no-download-game-hack PDF link annotation
    • http://pustaka.industri.ft.unand.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/roblox-hack-clients-jailbreak_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/free-tolls-roblox-ultimate-driving_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/lit-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/robux-generator-app-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/free-hair-in-roblox-all-names_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/how-to-hack-atms-in-roblox-libertay-county_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/how-to-hack-roblox-accounts-2021-october_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/roblox-shinobi-life-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/how-to-hack-roblox-account-on-mobile-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/hack-for-robux-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/roblox-how-to-cheat-the-disconnect-thing_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/t-shirt-roblox-adidas-free_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/husky-roblox-free-robux-link_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/free-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_off000030c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C6 22408 bytes
SHA-256: d31985cc9aa216adced9548489658fb098ddbd6a993bc726900e3d3be586a6b9
font_01_sfnt_off000062da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62DA 19520 bytes
SHA-256: dea9e49cb04da834d210ceb0c1e904b512d3415fe5f73f6e61e9531fff787f16

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