Malicious PDF — malware analysis report

Static analysis result for SHA-256 853b98d27d08cfc5…

MALICIOUS

PDF

33.2 KB Created: 2021-07-19 12:59:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: df14027c45087b02caab3c864cc33069 SHA-1: 77caef0c8867309779ed00c47399a61d977d5217 SHA-256: 853b98d27d08cfc526b8ad074965700819ea5832a672175f643cc92c112882a4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free spins for Coin Master, directing users to external URLs. The primary malicious URL identified is http://netcdn.tw/app/406889139/coin-master-free-spin-ml-game-hack, which likely serves as a gateway to a malicious payload or phishing page. The document's structure and embedded links strongly suggest an attempt to trick users into downloading or visiting potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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-spin-ml-game-hack PDF link annotation
    • http://www.glabintl.com/uploaded_files/userfiles/files/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/free-100-robux_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.glabintl.com/uploaded_files/userfiles/files/free-coin-master-spins-blog_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_off00002d1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D1B 23016 bytes
SHA-256: b1328b4f6a29ae5e72bd475fbc44139c969ca20896115455a32a8a6e15eac865
font_01_sfnt_off000060ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60FF 17960 bytes
SHA-256: 444b71fec9169bc90a734dd5dd223b39b45661ce510f738c863c1de9395466a1

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