Malicious PDF — malware analysis report

Static analysis result for SHA-256 15aec9b8111708f3…

MALICIOUS

PDF

33.7 KB Created: 2021-07-03 12:42:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0c94fdc726c1e325e8a8fc9f416c5f10 SHA-1: f2fe756c451c2c12951e6b3574c6459185fe414a SHA-256: 15aec9b8111708f3876fba82a5912ad90310fb7ee443c2e0c9cfe4c1162d3c26
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary redirector URL identified is http://netcdn.tw/app/431946152/rblx-city-free-robux-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to trick users into visiting potentially harmful sites, likely for credential harvesting or further malware delivery.

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/rblx-city-free-robux-game-hack In PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-daily_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/clean-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-roblox-scripting-videos_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/como-vestirse-hackear-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-roblox-privet-strucid-servers_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-rs-cheat-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-blox-burg-money-hack_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/como-hackear-una-cuenta-de-roblox-facil-y-rapido_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/odes-for-free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-roblox-accounts-youtube_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/tiktok-free-coins-apk_GM835599320.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-codes-september-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/minecraft-gun-mod-download-free_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/despair-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F1E 21584 bytes
SHA-256: 71d34641bb5b33220022827c6ea4b3584283d1a080a93dbd1b7a23cc5fea9b52
font_01_sfnt_off00005e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E54 19196 bytes
SHA-256: f2f3397c6c781d56e9789bf5c46018266820e8d927479f7a86dfea2d7904bf30

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