Malicious PDF — malware analysis report

Static analysis result for SHA-256 504c667433a89d0b…

MALICIOUS

PDF

31.8 KB Created: 2021-07-03 17:08:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d8977cd5d6ff9ac9c64e42801eef2943 SHA-1: 8fa72fa96f0cf0fbe7c3a583b53dfe6aa3a58e98 SHA-256: 504c667433a89d0b7c5bd30d96dc5204356604a395107e1ce9e0ea48c20117b9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and generators. The primary lure URL, http://netcdn.tw/app/406889139/spin-coin-master-game-hack, is flagged as a known malicious redirector. The document body and heuristics indicate a social engineering tactic to trick users into visiting these sites, likely leading to further malware downloads or scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/406889139/spin-coin-master-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-without-paying-for-it_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/cant-make-my-items-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/codes-for-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-attack-hack_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-carfs-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-a380-free-model_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-coins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-what-does-e-free-mean_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hacks-roblox-muder-mistery-2_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-games_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
stream_001_off000027e5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x27E5 22640 bytes
SHA-256: 821432068b58bc87411c76eaa2b2290f59535e9333073414b509489c11ad93b8
font_01_sfnt_off00005a6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A6B 18008 bytes
SHA-256: 444f15a35c78c166699adcd76a2f0f40f85467b2212850aa9b6780836aa8b23a

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