Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e4999eb2b9d076b…

MALICIOUS

PDF

44.2 KB Created: 2021-06-03 12:28:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 868a35556b2de0d6bcbe2d115822988b SHA-1: 59fb81b239a2b9ce00bc939b59a7f0d1114b4338 SHA-256: 4e4999eb2b9d076bf518420a59ee0d5c05d560a042d1ce69d5ad013b2e07c7be
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. 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 0.9865

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.online/app/431946152/roblox-free-stuff-hack-2021-game-hack PDF link annotation
    • http://elibrary.perludem.org/repository/mcpe-master-hack-unlimited-coins-apk_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/pokemon-go-free-mew_GM1094591345.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-online-hack-no-survey-no-password_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-spins-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-many-levels-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/robux-website_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-no-password_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_off00005005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5005 24520 bytes
SHA-256: 8d435fa5eb127ef0ba4de5ac6c30b8b621e2738460df89d5634e6fddd1d2a8a7
font_01_sfnt_off000087d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87D0 18992 bytes
SHA-256: 49e4dea7f629099b008187e5d875e8d3c2443a3e9b93249e292f94660b06a881

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