Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a767f927d4c8ead…

MALICIOUS

PDF

35.4 KB Created: 2021-07-05 12:20:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b649d1c81df83e388f8c468360cbbdd7 SHA-1: 97e64a1c9ef95a433944ef1f5922e82047b761ac SHA-256: 4a767f927d4c8eade0ee730efa8b9ca18dad7c2b22d7eb64c22b4350f64c3cd4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary lure pointing to a 'free spins coin master game hack'. This heuristic, combined with the ML classifier's high confidence, indicates a social engineering tactic to redirect users to potentially malicious content. Although no scripts were extracted, the presence of numerous game-related lures suggests a common phishing or scamming campaign.

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/406889139/40-free-spins-coin-master-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/free-robux-22-02-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/is-a-roblox-account-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/wwwhacks-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/earngg-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/robux-website_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-exploits-website-downloads-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/hacks-for-roblox-assassin-auto-aiming_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/wurst-112_GM479516143.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_off0000359c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x359C 22392 bytes
SHA-256: 25d79f069cb69792b1328d5ebc0d2355596c601afd935203e859070092803901
font_01_sfnt_off0000676e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x676E 18408 bytes
SHA-256: ce82454962f5f3d8f32b8d714c7dfb82c9591ccd0919bf0a26c63f76146bf830

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