Malicious PDF — malware analysis report

Static analysis result for SHA-256 671e73c2fb0d3d51…

MALICIOUS

PDF

53.6 KB Created: 2021-06-10 23:45:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4760eade6f4bb36d6ddef973347e0abd SHA-1: e36e5f440f49d9c5f560f1fa3d95bf7a3f3f4f48 SHA-256: 671e73c2fb0d3d51c98046bdb4e826d85d76a03542e7251937ded7b29cbd9ad8
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 0.9835

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.tw/app/431946152/how-to-get-free-money-in-roblox-jailbreak-2021-game-hack PDF link annotation
    • https://www.sonestad.se/library/repository/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-studio-free-templates_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/robux-codes-for-free_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/btools-roblox-hack-jailbreak_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-free-download_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • https://www.sonestad.se/library/repository/free-robux-generator-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_off00005266.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5266 40748 bytes
SHA-256: 14a4bbe42ea2fd70d4312cb5d64bfc34956c6fd3ca0c9ef958969f747c4d31e0
font_01_sfnt_off0000ab72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB72 19680 bytes
SHA-256: becd99a661e9505107e24cd6d101dede9331634f1eba1cac9825346377083a6d

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