Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b46a4af83b7133…

MALICIOUS

PDF

45.6 KB Created: 2021-05-12 01:13:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 14793680451f31c6a138f4c41e9d503c SHA-1: 4cdce237b7c44f8794b05a3f71d2a14f3c8e6183 SHA-256: 15b46a4af83b7133ddf202e5f32d71fdc4064a23e531da14f3a27ff8a7fcf11d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering 'free generators' and 'hacks' for popular games, which is a common lure for malicious content. The heuristic firings indicate these links point to known malicious redirectors and the overall document structure was flagged by a machine learning classifier. While no scripts were explicitly extracted, the embedded URLs are the primary indicators of malicious intent, likely leading to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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 https://netcdn.xyz/app/406889139/coin-master-download-hack-game-hack In PDF document text
    • http://iacfhouston.com/images/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://iacfhouston.com/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://iacfhouston.com/images/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://iacfhouston.com/images/how-do-you-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://iacfhouston.com/images/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://iacfhouston.com/images/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://iacfhouston.com/images/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://iacfhouston.com/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://iacfhouston.com/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://iacfhouston.com/images/how-to-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://iacfhouston.com/images/how-to-get-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://iacfhouston.com/images/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://iacfhouston.com/images/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • http://iacfhouston.com/images/freerobuxhack-us_GM431946152.pdfIn PDF document text
    • http://iacfhouston.com/images/free-robux-app_GM431946152.pdfIn PDF document text
    • http://iacfhouston.com/images/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://iacfhouston.com/images/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://iacfhouston.com/images/coin-master-free-spins-link-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://iacfhouston.com/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://iacfhouston.com/images/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a89.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A89 25752 bytes
SHA-256: 568be494bc9e0dcc17b53289ad4aa84acb36f5881f3f7d815d9faf6bd367e605
font_01_sfnt_off000085d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85D7 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F88 18296 bytes
SHA-256: 7196709c2759277e2e42e139668fa96563a46faba9c7eb1d5fb5a9848ee95e79

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