Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0fcbdbbb16cb729…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 18:58:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: a057fdcf2c7b728356212e9758f93924 SHA-1: d79beaba48eb3f309740c49c4367b2f8129eaff8 SHA-256: e0fcbdbbb16cb729470f9834581de8ae8adccdd7dc278e28c69ad74c350d8722
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/apps-for-free-spins-on-coin-master-game-hack PDF link annotation
    • http://elibrary.perludem.org/repository/roblox-rewards-site_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-robux-for-free-2021-on-phone_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/best-gams-on-roblox-that-are-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-links-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-health-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/dragon-ball-ultimate-roblox-max-stats-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/apps-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-free-robux-code-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-obc-cheat_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-free-download-ipad_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robux-cheat-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-gift-ard-codes-valid-codes_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-vpns-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/download-hack-coin-master-apk_GM406889139.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_002_off0000314f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x314F 22608 bytes
SHA-256: 39e9ecf83a16b92167755f36f8c1b0897c618260a864f93a24c3036b9f4f389d
font_01_sfnt_off000063f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F1 18176 bytes
SHA-256: 4d8eb0f8a0ca3875223533dbcbb3aa7de45378118781519f1d2f46a8ca285011

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