Malicious PDF — malware analysis report

Static analysis result for SHA-256 515fd157d501e221…

MALICIOUS

PDF

35.1 KB Created: 2021-06-30 02:20:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6b5589830c3731cada3f13a8a0d105c0 SHA-1: 762048dbe2ae4e5fd2d3cf19e11efa196e6943f9 SHA-256: 515fd157d501e2217601f47e267c977129879c73e80f5b657bc574bbaa14b08d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one that redirects to known malicious infrastructure. The document body and embedded links suggest a lure for game-related cheats or generators, a common tactic for phishing or malware distribution. 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 0.9980

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/fnaf-hack-script-roblox-game-hack In PDF document text
    • https://lib-stie.yai.ac.id/repository/free-roblox-fan-clubs_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-bugatti-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/pastebin-free-robux-no-wait_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/tiktok-likes-free-2021_GM835599320.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/ash-greninja-free-shopping-in-roblox_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-on-roblox-meep-city-2021_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/pokemon-go-free-healing_GM1094591345.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/get-free-robux-no-human-verification-or-download_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/moonactive-coin-master_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/earn-free-robux-by-doing-tasks_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-generator-no-fake_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/descarga-de-roblox-hack-mod_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-no-human-verification-no-survey_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_off00003250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3250 22328 bytes
SHA-256: 163438afa5fca90872e2485a82e375be59b91d039d951a94ca1a77905506628a
font_01_sfnt_off000063a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A4 19220 bytes
SHA-256: f9b4d202a24476307219b4ab955ee288b384a38a3d432d64a6832b8e5c1006c5

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