Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b8978881bbd950…

MALICIOUS

PDF

36.1 KB Created: 2021-07-03 20:24:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 4285b051ecc0ba3a0078d4d1f502631e SHA-1: bb268e95ff1e95b080bc06b4ce3b39d41982f09d SHA-256: 07b8978881bbd950d05dd35fbaddbebb3f79f2c87876cee5d48cfa5681d41daa
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/coin-master-mod-apk-unlimited-spin-download-free-full-version-game-hack PDF link annotation
    • https://learnwmf.org/image/data/files/claim-free-robux-now_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/coinmaster-spins_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/how-to-hack-roblox-with-notepad_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-things-on-roblox_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/how-to-get-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/indetectable-cheat-roblox-fly_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-card-generator-roblox_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/roblox-money-hack-apk-download_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/coin-master-app_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/in-jack-hack-roblox_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/coin-master-hack-generator_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/links-to-get-free-spins-on-coin-master_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
font_00_sfnt_off00003348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3348 22904 bytes
SHA-256: 074ca5db4a2a54962bf5366bd206468e0d473a7d8050587375def470ae187834
font_01_sfnt_off000066b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66B8 19644 bytes
SHA-256: 93f2d3fa6be328934c38f819826887a058c13247078841697941bd7ee8192d3d

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