Malicious PDF — malware analysis report

Static analysis result for SHA-256 de58e57d1212d030…

MALICIOUS

PDF

36.1 KB Created: 2021-06-28 05:15:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e8b90a1f62b761756bb3cc3ab3e95c8e SHA-1: 0936707bfa1f29bec98436b356298985680ebaa6 SHA-256: de58e57d1212d03011a63eaaf56747050ca15cb8f26f9d1d486cb1ffe60ef8cb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains heuristics indicating it links to malicious redirector infrastructure, specifically a lure for game hacks. The embedded URL 'http://netcdn.co/app/431946152/como-hackear-una-cuenta-de-roblox-2021-game-hack' is identified as a malicious redirector. The document body, though partially corrupted, contains text related to 'Como Hackear Una Cuenta De Roblox 2021' and the same URL, reinforcing the lure. The presence of PDF-specific malicious link heuristics and ML classification strongly suggests malicious intent.

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/como-hackear-una-cuenta-de-roblox-2021-game-hack In PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/roblox-cheat-engine-64-download_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/roblox-hack-site-android_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/boku-no-roblox-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-robux-glitch-july-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/hax-teamcf-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/is-roblox-free-on-chromebook_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/hack-robux-using-cjrom-web-store_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/how-to-get-free-robux-for-games_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/how-to-get-free-robux-scam_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-tiktok-comments_GM835599320.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/robux-infinite-free_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/robux-hack-for-free-easy-no-download_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/roblox-counter-blox-hack-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/how-do-you-get-free-roblox-2021_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_off000032a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32A4 22888 bytes
SHA-256: e99ec99e5eda95ba292c51d5d73b2bc90829459996715acc186d273a8c2ff573
font_01_sfnt_off00006627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6627 19728 bytes
SHA-256: b76a1e54f18f8cdb26fc7edf6955aa2d94df7536b920f7da8cec9c60e447ccf3

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