Malicious PDF — malware analysis report

Static analysis result for SHA-256 24d79f86e105046c…

MALICIOUS

PDF

33.6 KB Created: 2021-07-19 22:29:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7c349b059139e9cdda3629a0f4ad7d41 SHA-1: e2bcb50edb190e01d4c0c6229733fee32403a797 SHA-256: 24d79f86e105046cb78c20b6f6e65f3aa9c72c3bca38c3355684dcbb1121ed32
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirector infrastructure, specifically advertising 'free generators' for popular games. The primary lure URL is http://netcdn.tw/app/406889139/coin-master-free-game-hack, which likely serves as a gateway to further malicious content or phishing pages. The document's structure and embedded links strongly suggest a social engineering tactic to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-game-hack In PDF document text
    • http://msfs-eastafrica.com/images/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/minecraft-name-tag-hacks_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
stream_002_off00002d2a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D2A 23600 bytes
SHA-256: 85373b2832d0905d29c8bb7c59e06f4f50b8db92bb00ff5f9e3b087343abb7f3
font_01_sfnt_off00006301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6301 17712 bytes
SHA-256: 0afd6f2792edb83b7f2a0201a1e0a5eb12ca81ad868fb3e42742340ee6e5fb0e

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