Malicious PDF — malware analysis report

Static analysis result for SHA-256 538f591fdf541e76…

MALICIOUS

PDF

35.8 KB Created: 2021-06-29 07:26:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 29057fa16827eee7e1106af2e35eb656 SHA-1: 1286bb910f7ef7ca81ed164eb6c9fc33175acadf SHA-256: 538f591fdf541e764d4cc2b79f181a76786bc606d742cfb6204e638f66320a1a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'game hacks' for popular games like Roblox. The heuristic firings confirm these links point to known malicious redirectors and a lure for game hacks. The document body, though partially garbled, contains references to these lures and embedded URLs, reinforcing the phishing and redirection attempt.

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/roblox-free-download-windows-7-64-bit-game-hack In PDF document text
    • http://pustaka.pn-calang.go.id/repository/ash-greninja-free-shopping-in-roblox-on-roblox-shopping-shirt_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/get-free-robux-no-joke_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-30000-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-views-on-tiktok_GM835599320.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-powering-imagination-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/descargar-hack-sunset-city-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-get-free-money-in-roblox-vehicle-simulator_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-make-anything-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-use-cheat-engine-64-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/blogger-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-get-free-robux-2021-not-patched-read-desc_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/roblox-zone-hack_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-ad_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_off0000310d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x310D 22860 bytes
SHA-256: 77b716d5bf1433d047964de992238d658135a5d5bf6aa967e16637e5e118bb89
font_01_sfnt_off0000643f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x643F 19864 bytes
SHA-256: 6d7c9faae472b9178dc42408233c2eb1f45c67b402f2ceec54e0da2d70db3d8e

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