Malicious PDF — malware analysis report

Static analysis result for SHA-256 61800b4a6e4ab411…

MALICIOUS

PDF

34.3 KB Created: 2021-07-07 02:43:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2fcdb05a2edc419eb4f0895cadcc0718 SHA-1: 6f65bb50225be3bb16d76d6db0dd926319c3c100 SHA-256: 61800b4a6e4ab4113a0044a15b8a438fb073ed5a28e72e64edb1f0364131be1f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and references to game hacks and free in-game currency, specifically for popular games like Coin Master. The primary URL, http://netcdn.tw/app/406889139/coin-master-free-coins-and-spins-app-game-hack, is flagged as a lure for game hacks. This suggests a social engineering tactic to trick users into visiting potentially malicious sites. No scripts were extracted, but the document's structure and embedded URLs strongly indicate a phishing or scam attempt.

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-coins-and-spins-app-game-hack PDF link annotation
    • https://www.donjastubica.hr/files/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • https://www.donjastubica.hr/files/how-to-get-tiktok-followers-for-free_GM835599320.pdfIn PDF document text
    • https://www.donjastubica.hr/files/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-gift-link_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-5-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://www.donjastubica.hr/files/pubg-uc-purchase_GM1330123889.pdfIn PDF document text
    • https://www.donjastubica.hr/files/roblox-hack-ninja-simulator-hacked_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/roblox-hack-game-download_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/como-hackear-el-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/hack-avatar-robux_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-robux-thumbnail_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_off00002f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5F 23008 bytes
SHA-256: 4a25aefa4521375adec873b9d9a3956546fe1a716ccb7b9126439a0bd08bc2fd
font_01_sfnt_off00006318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6318 18348 bytes
SHA-256: 8f4e14d352258b2a04c4750a5c5e6ee18e44525ef82eed3820f54d352c64eef8

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