Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f03e1a9b55943eb…

MALICIOUS

PDF

35.9 KB Created: 2021-07-04 21:47:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: aef34096641b36384d7f7fd1f0f5e0f9 SHA-1: a340fa73d56f49eac30aaa7183220deb7439c3e0 SHA-256: 6f03e1a9b55943eba11f2fc9fddcb7dc62cb11192898974b8ee465238a00dbd0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector infrastructure, specifically http://netcdn.tw/app/431946152/roblox-free-robux-website-game-hack. The document body and embedded links suggest a lure for game-related cheats or currency, a common tactic for distributing malware or leading users to phishing sites. The ML classifier also strongly indicated maliciousness.

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/roblox-free-robux-website-game-hack In PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-hack-roblox-accounts-without-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-hack-generator-inpect_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-use-hack-on-roblox-with-admin_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/robux-cheat-2021_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-official-page_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-download-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/is-it-ileagal-to-hack-on-a-game-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/actual-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-free-catalog-items-pastebin_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-dump-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-codes-2021-and-how-to-imput-them_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-games-on-ipad_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-cards_GM406889139.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_off00003566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3566 22256 bytes
SHA-256: 3294784922dc12a0e3633fa55d7a4e89dd2599f198cd02b9066a78b448b18363
font_01_sfnt_off000066c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66C9 19212 bytes
SHA-256: 4b1e8e9c88347b3f29ea09d9c43ed0e523ec5f5ba27152f0fbcfe198ff1f6a17

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