Malicious PDF — malware analysis report

Static analysis result for SHA-256 50882177f136ffd9…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 08:33:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8cba30e594928194977f5f9b6a0c47ea SHA-1: 18c22b73d5bb1ca58097c9f36090ca2f1c0725a7 SHA-256: 50882177f136ffd92e67cf79f356ca9dfd8c3d0e62ff5d0705f1cf1d76a297d1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary focus on luring users with promises of 'free spins' and 'game hacks' for popular games like Coin Master and Roblox. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this deceptive intent. The document's content and structure suggest it is designed to trick users into visiting malicious websites, likely to download malware or engage in phishing. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

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-free-spins-link-2021-download-game-hack PDF link annotation
    • http://lib.uho.ac.id/library//repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-bad-business-hacks_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-2021-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/tiktok-free-no-download_GM835599320.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/como-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/apps-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-and-coins-for-iphone_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-spin-hack-pc_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_off00003300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3300 22180 bytes
SHA-256: b9c5a92e3362139e5af16db316b32ef9c60fc4a6b980da1e36edf073946306a7
font_01_sfnt_off000063f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F2 19328 bytes
SHA-256: c9456106261516b9bfa0d3ee3152032b43a61c3b63827a777d443b4b8c7c4270

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