Malicious PDF — malware analysis report

Static analysis result for SHA-256 31b3133689073d34…

MALICIOUS

PDF

35.5 KB Created: 2021-06-25 21:31:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fe70c4a425425624c4f5b945ce0cd037 SHA-1: e61672eead04f6b3c1585373f6c0be0f3890123f SHA-256: 31b3133689073d345df8f03e89bd175d5a228a6af734aec8af876552c8761672
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and sites offering game hacks and currency, indicating a lure for users to download potentially malicious content. The heuristic firings confirm the presence of malicious redirector links and a general lure for game hacks. No scripts were extracted, but the embedded URLs and document content strongly suggest a phishing or malware distribution 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/free-walking-animation-for-roblox-game-hack In PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/minecraft-dungeons-free-download-pc_GM479516143.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/roblox-koul-admin-cheats_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-spins-ios_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/hack-roblox-jailbreak-2021-money_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/is-roblox-hacked_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-robux-generator-may-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-do-you-grt-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/roblox-booga-booga-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/master-coin-hack-mod_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-rewards-link_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-gamepass-roblox-scripts-site-v3rmillionnet_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/https-rbx-place-rewards_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/robux-gratis_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-roblox-accounts-with-bc-2021_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_off00003135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3135 22880 bytes
SHA-256: 2e621cccf25920ab47fda255c01e9e63297e7240ea1bd2fe6cff60aa1629f06b
font_01_sfnt_off00006491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6491 19500 bytes
SHA-256: f4392288b3ba69b55e1b98a32a2e18ba9ba153530857482bc5d953ddc1b8ddf8

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