Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4d327f7c1f79c5a…

MALICIOUS

PDF

43.9 KB Created: 2021-05-13 08:31:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 44bf134523e0e0844853b85259a71849 SHA-1: e49ba1fd7878a6bfb5bd23ea1308d39e5cda269c SHA-256: b4d327f7c1f79c5adf960e6fa935eb90fc08fdcc009c406f4d24bd47dd55cc75
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting "free Robux" and "game hacks" to lure victims. The document body, though partially corrupted, contains text related to these lures and the primary malicious URL. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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/how-to-make-free-robux-game-hack In PDF document text
    • http://www.ipsiagmarconi.it/images/coin-master-time-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/free-robux-script_GM431946152.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/coin-master-hack-with-facebook-login_GM406889139.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ipsiagmarconi.it/images/gain-robux_GM431946152.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_003_off0000480a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x480A 28760 bytes
SHA-256: 40003aef233a62c9a47eb039765f00d88ca71f41f0dc37546ae94b7775a32d40
font_01_sfnt_off000087d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87D6 18772 bytes
SHA-256: bc975d0cd3d1d09474d4302e54d359df6d5266f7e81f0636855fd998b44c4aca

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