Malicious PDF — malware analysis report

Static analysis result for SHA-256 58ee1bb961081a77…

MALICIOUS

PDF

33.6 KB Created: 2021-07-06 06:12:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 46dfca55f7df8e8663932a4b79a9ac64 SHA-1: 8bf0b7f4105b7daf8a8c9afa6aacba07f36bb122 SHA-256: 58ee1bb961081a776e137d8d23f8ba6e9c35f513a75eaa1c6d030f8ae5369082
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.tw/app/479516143/minecraft-diamond-finder-hack-game-hack PDF link annotation
    • http://digilib.stimata.ac.id/repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-com-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/mathep_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-a-free-robux-to-subsricbe_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/can-you-really-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/tiktok-free-online-download_GM835599320.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/www-roblox-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-hack-mod-game-download_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/cool-tshirts-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-card-codes-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-roblox-bubble-gum-simulator-accounts_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/your-life-free-trial-has-expired-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-free-robux-no-human-verification_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_off00002f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5B 21732 bytes
SHA-256: a7fbac36178cf4a9c5fbb11c8286ac50a39d1890834c2bf3e51e8a3ab92a97f6
font_01_sfnt_off00005f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1B 18768 bytes
SHA-256: 1598c3682c859f253aba253f2e5c14b5c25da3ef850df7010b86b0bb11aa0ad8

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