Malicious PDF — malware analysis report

Static analysis result for SHA-256 72f797e11e8b3301…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 22:45:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 398a84b6f24af9e950bf0b2886965581 SHA-1: a6837434052954b39dde1538e42ee2d08e1c54a2 SHA-256: 72f797e11e8b33016175fe3a70833850a086fe2ba5bf1143a76c77978ae30419
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/406889139/moonactive-free-spins-coin-master-game-hack PDF link annotation
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/speed-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-hack-sharkbite-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-robux-2-15-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-hack-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-coins-for-coin-master-blogger_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/get-anything-in-the-roblox-catalog-for-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-hacks-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-cheat-on-robux-to-play-game-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-tiktok-likes-and-followers_GM835599320.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/get-free-robux-on-roblox-without-human-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-roebucks-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/ap-get-free-robux-and-tips-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/can-you-give-me-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-get_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_off00002fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC2 22380 bytes
SHA-256: 650f451e1a008375619091f1564e3e66de295cedc4bd036d42ffa85adbb301d9
font_01_sfnt_off00006192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6192 18288 bytes
SHA-256: 9cb413fee599b756ba85b223fa28fd67b573b4b10bafd0121ae3f2b65a066c18

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