Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe4653094dac9af6…

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 14:46:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 89fd9f29757ea17fdadcef4afda0db09 SHA-1: bba2761939be2376b04ca90b9a47899dc5f25837 SHA-256: fe4653094dac9af6afe9c3456cd4ecaa69c6dff766186b59b5cfae56b69fd6ec
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 0.9865

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 https://netcdn.online/app/406889139/coin-master-500-free-spins-game-hack PDF link annotation
    • http://library.futureuniversity.com/repository/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/is-roblox-free-on-xbox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/pubg-uc-hilesi_GM1330123889.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-mod-version-free-download-34-4_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-spins-ios-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-promo-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-hack-coin-master-computer_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-robux-as-a-kid_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_off0000518e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x518E 24284 bytes
SHA-256: 2e16051ac28ef0b364e3311c411f8f66eb1e63277cecb17a2d1edd1e15c93039
font_01_sfnt_off00008971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8971 18192 bytes
SHA-256: 125a73f883adbce2d9ba98dbcdb707663d1ca3c21f762afcc3d4ea8c4cd052f9

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