Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb53a08a2c2179d6…

MALICIOUS

PDF

36.1 KB Created: 2021-06-26 04:46:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b661cb3a0a9a2350bfe52f94ebed639b SHA-1: 134bc386b0c03a3fad90546cca0962a34fc9b215 SHA-256: fb53a08a2c2179d69572ae538bf3af5953feeb448e26478861386067cb9ff277
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/how-to-get-free-money-in-adopt-me-on-roblox-game-hack PDF link annotation
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/old-roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/roblox-printables-free_GM431946152.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/how-to-get-java-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/free-coin-master-coins-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • https://elearning.man-purbalingga.sch.id/__statics/gudangsoal/files/how-do-you-get-free-roblox-robux-in-roblox_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_off00003496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3496 22356 bytes
SHA-256: e5276c5d5a6698d66f7f1229f9a7207411102f9b57446d43a3bc20a82958ce83
font_01_sfnt_off0000665c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x665C 19644 bytes
SHA-256: c684093457ea86b3bfa161485b672dfe2b0a5bcb9d5f1d740e687d2bd5e9241d

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