Malicious PDF — malware analysis report

Static analysis result for SHA-256 0af86c03408eaad4…

MALICIOUS

PDF

33.7 KB Created: 2021-07-03 12:23:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 820ef0bfe3d7b3d51470bb92ea11e9bb SHA-1: 2526f19bc5b456b2d9be04f8a4b0f229beb0be67 SHA-256: 0af86c03408eaad492b248da41383baa2e0cc2c172a774d57fd4668a80aced65
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, designed to lure users into clicking for free game currency or hacks. The primary malicious link, http://netcdn.tw/app/431946152/how-can-you-get-free-robux-game-hack, is likely part of a phishing or scam campaign. No scripts were extracted, but the embedded URLs and the nature of the lure strongly suggest a social engineering attack.

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.tw/app/431946152/how-can-you-get-free-robux-game-hack In PDF document text
    • http://pustaka.fk.unand.ac.id/repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/300-roblox-accounts-free-v34m_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/roblox-free-group-finder_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/app-free-robux-google-play_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/how-to-get-2021-2021-account-roblox-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/ways-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/cheat-argent-sur-roblox-vehicle-simulator_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/hacked-roblox-2021x2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/roblox-sprinting-simulator-cheats_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/how-to-hack-in-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/boku-no-roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/free-t-shirts-roblox-to-look-like-a-pro_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/how-to-get-free-robux-no-hack-or-cheat-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fk.unand.ac.id/repository/how-do-you-get-free-stuff-in-roblox_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_off00002f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F3F 21528 bytes
SHA-256: b194b56b52a2b928d7fcc29b48a91f2754b6d161d9d312afa9fc2b3fecbdb1e1
font_01_sfnt_off00005e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5F 19144 bytes
SHA-256: 8668bba6b571f2ff0c38dc1335afffc5959d5ef775e0221b19e79d7de012f826

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