Malicious PDF — malware analysis report

Static analysis result for SHA-256 de695fed65c144b2…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 00:44:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ba9316b5586c46ec33c931c10fa45da9 SHA-1: 9599bf3d226033c712b59f48d547b306dd68bb73 SHA-256: de695fed65c144b296cbee1e96bb1126bb05a273788844ed632613bc02a898e1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including a high-priority lure for a game hack, directing users to potentially malicious websites. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to redirect users to download unwanted software or engage in phishing.

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.tw/app/406889139/coin-master-tool-hack-game-hack PDF link annotation
    • http://digilib.stimata.ac.id/repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-and-tix-generator-no-survey-or-download_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/krnl-download_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-blogspot-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-spins-coin-master-site-wwwquoracom_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-for-pressing-the-button_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/robux-hack-site_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-script-adopt-and-raise-a-cute-baby-free-admin_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/robux-sites_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/wurst-client-18-9_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_off000030a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A9 22700 bytes
SHA-256: 702cd38584574b58dd03204b74ea9b7180df210e9cc42091bcf30f77ca32fb04
font_01_sfnt_off00006395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6395 18080 bytes
SHA-256: e08d712d3c7717e534c8527a13ecdf608e6cf7fb005f990d3f063776d4a09a25

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