Malicious PDF — malware analysis report

Static analysis result for SHA-256 53159956dcb1332e…

MALICIOUS

PDF

35.1 KB Created: 2021-06-29 15:04:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: db841614e87177e3b999ca00defddaa8 SHA-1: e473fe3e211d8c94f21f04bd7a64af3eb6be6153 SHA-256: 53159956dcb1332ea83682b7c405f7efdd7fce333860796095d9a719ac91fd81
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically advertising game hacks and free currency for popular games. The primary lure URL is http://netcdn.co/app/431946152/how-to-hack-youre-hacked-account-back-on-roblox-game-hack. While no scripts were extracted, the embedded URLs and the 'PDF_GAME_HACK_REDIRECT_LURE' heuristic strongly indicate a phishing or scam attempt designed to redirect users to potentially malicious sites.

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/how-to-hack-youre-hacked-account-back-on-roblox-game-hack In PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-cheat-on-roblox-tycoons_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/coin-master-time-hack-2021_GM406889139.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/youtube-hack-de-juegos-apk-robux_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-roblox-without-download_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/lots-of-free-robux_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/discord-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/hack-john-doe-roblox-account_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-inject-hacks-into-roblox_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-anti-anti-cheat_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-robux-without-hacking-2021_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-roblox-packages-for-free_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-clothes-on-roblox-mac_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/roblox-strucid-alpha-hack_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://repository.stikesindramayu.ac.id/repository/how-to-get-free-robux-website_GM431946152.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_off00003111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3111 22448 bytes
SHA-256: f547a0d02c6c8078d95901c90c24c16c33ee15fd329c5885e9af6d634a2a6a7c
font_01_sfnt_off000062dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62DC 19400 bytes
SHA-256: 2a0114f392507f1c76d3a3037e992314038b9c716b9798eaee949917037bb997

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