Malicious PDF — malware analysis report

Static analysis result for SHA-256 69138aced1dc91ad…

MALICIOUS

PDF

44.7 KB Created: 2021-06-04 00:01:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 18f149abd89bf5f0a8740866677758f4 SHA-1: 686ecc92da25c431bba2a2f02f393362f4d64ce1 SHA-256: 69138aced1dc91adcae9db8b22cd5eb0ea2cb575524c48a22f64cc5993714eab
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 0.9865

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.online/app/406889139/coin-master-free-spins-hack-apk-download-game-hack PDF link annotation
    • http://elibrary.perludem.org/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spin-2912-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-minecraft-account-reddit_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/huskybuscom-free-robux_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_off00005281.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5281 24952 bytes
SHA-256: 09e6e477a71e2a3b5ed4997bc93a588a20c46c0c36792d81aee81ad5fa062588
font_01_sfnt_off00008b4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4A 18636 bytes
SHA-256: 5481d0302ec3c0ba5c2d586dcd50dd6b5df695462c9cc4a17d5c66f6ba577068

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