Malicious PDF — malware analysis report

Static analysis result for SHA-256 391d0ea9873d9279…

MALICIOUS

PDF

34.5 KB Created: 2021-06-19 08:53:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 49d31ce508167f81d3e38f064f9356f1 SHA-1: 067b0df7d600ecc3da1db3ef7f613b4f2410da98 SHA-256: 391d0ea9873d92795c316921009075c61d5b750c36e991c7c5700a2df3853fae
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and free items. The document body and extracted URLs indicate a phishing attempt for game-related exploits. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest a malicious redirector chain designed to deliver further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/free-roblox-1b--roblox-accounts-game-hack In PDF document text
    • http://casabea.de/images/roblox-admin-hack-client_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • http://casabea.de/images/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/treasure-hunter-simulator-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://casabea.de/images/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/strucid-aimbot_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://casabea.de/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://casabea.de/images/pokemon-go-free-coins-promo-code_GM1094591345.pdfIn PDF document text
    • http://casabea.de/images/codes-for-free-robux-2021-that-no-one-use_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
font_00_sfnt_off00003215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3215 21892 bytes
SHA-256: 82514bd19c288a917afa3ac14770e5a34ea0604ee8e06accced291711a961ad7
font_01_sfnt_off0000627e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x627E 18816 bytes
SHA-256: 482e66b7c79c5606e2a39f186a65a55ed55d2a4370e8159b9170e0ec9a396010

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