Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a93d3d365c15720…

MALICIOUS

PDF

32.5 KB Created: 2021-06-18 07:22:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7281b0b71994427b7da3dbde987d1844 SHA-1: bb141600a10452c81aabb368acc2670452e2531d SHA-256: 3a93d3d365c157209d745e4025c151304b9340a9ffd99099788bcdce69e1fcff
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising "free generators" and "game hacks" for popular games. The primary lure URL, http://netcdn.co/app/431946152/rank-centers-roblox-free-game-hack, is identified as malicious infrastructure. The document body also contains numerous links to other potentially malicious PDF files hosted on fccsms.com, suggesting a campaign distributing malware or engaging in phishing through these lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.co/app/431946152/rank-centers-roblox-free-game-hack In PDF document text
    • http://fccsms.com/images/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://fccsms.com/images/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • http://fccsms.com/images/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://fccsms.com/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://fccsms.com/images/get-my-hacked-roblox-account-back_GM431946152.pdfIn PDF document text
    • http://fccsms.com/images/hack-coin-master-apk-31_GM406889139.pdfIn PDF document text
    • http://fccsms.com/images/pubg-uc-online-generator_GM1330123889.pdfIn PDF document text
    • http://fccsms.com/images/coin-master-hack-tool-india_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_off000028da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28DA 22480 bytes
SHA-256: 8d799a799e4ee7598b5a6207dd93d90bd59fcea169e1e51bd86e7f456f275091
font_01_sfnt_off00005b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B07 18736 bytes
SHA-256: 4dafcc443af7b8ae6327477d4c21d30fc41022ce47eed5126dcdd1fcbe916955

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