Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef8ef816245a04ba…

MALICIOUS

PDF

43.3 KB Created: 2021-05-15 17:02:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 11836626c8cea12ab6c3caeb11e5e693 SHA-1: 4fbe3d2d9dbca3008ccde15632a89e72342dfbd5 SHA-256: ef8ef816245a04bad7ebf3032b7dfef0790a917398ef17e557c3681feb9a78e3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically targeting users with lures for game hacks and currency. The heuristic firings indicate that the PDF is designed to trick users into clicking these links, which are associated with known malicious redirectors. No scripts were extracted, but the embedded URLs and the nature of the lures suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/free-robux-sites-that-work-game-hack In PDF document text
    • http://alroglobal.com/images/wurst-115-2_GM479516143.pdfIn PDF document text
    • http://alroglobal.com/images/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://alroglobal.com/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://alroglobal.com/images/roblox-free-clothes-girl_GM431946152.pdfIn PDF document text
    • http://alroglobal.com/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://alroglobal.com/images/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://alroglobal.com/images/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://alroglobal.com/images/coin-master-free-spins-link-october-2021_GM406889139.pdfIn PDF document text
    • http://alroglobal.com/images/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://alroglobal.com/images/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://alroglobal.com/images/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://alroglobal.com/images/earn-robux-sites_GM431946152.pdfIn PDF document text
    • http://alroglobal.com/images/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • http://alroglobal.com/images/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://alroglobal.com/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://alroglobal.com/images/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://alroglobal.com/images/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://alroglobal.com/images/coin-master-fan_GM406889139.pdfIn PDF document text
    • http://alroglobal.com/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://alroglobal.com/images/coin-master-haktuts_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_off0000454e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x454E 28340 bytes
SHA-256: 95f36595dc6869f3d25b074a0b482c983fcac24f534b5ceafd99f94cefc4dfc4
font_01_sfnt_off000084e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84E6 19000 bytes
SHA-256: c0bc6bb0706fab35ff455fc4816471a1ab7f6ae4486f691ef98043b3efa3f18d

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