Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a4db4919b4d6e24…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 05:50:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 25b3870f68dfbd26048168beb701343a SHA-1: d3f35ecf410df06642c53e51391555043c2292fb SHA-256: 2a4db4919b4d6e24afe307b0ac6dda0db7cec9360ed30aea96b3daee30fc033d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a high-severity heuristic indicating it links to a game hack lure. The document body and extracted URLs reinforce this, pointing to a URL that promises 'free spins and coins' for a game. This suggests the PDF is designed to trick users into visiting a malicious site, likely to download further malware or engage in credential harvesting.

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/free-spins-and-coins-coin-master-app-game-hack PDF link annotation
    • https://allpromise.com.tw/image/data/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/all-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/coinmaster-spin-ml-free_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-backdoor-source-roblox_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-robux-generator-today-only_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/coin-master-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/treasure-hunt-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/minecraft-free_GM479516143.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-robux-mobile_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/roblox-lovenet_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://allpromise.com.tw/image/data/files/claimrbx-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
font_00_sfnt_off00003041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3041 22708 bytes
SHA-256: de8ef1cb9b2118f00415e1bb80ec8e7e214134934fdc204362011cdcbd696ee0
font_01_sfnt_off000062fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62FB 18348 bytes
SHA-256: e3514f5c13c59f74fe131b320bb4a7a21799b0fccf5b53c141d50f68870e844d

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