Malicious PDF — malware analysis report

Static analysis result for SHA-256 9167033ea65977d0…

MALICIOUS

PDF

34.6 KB Created: 2021-07-09 09:41:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 05c724d5f5fcb19b6c7e3a680f0757e7 SHA-1: fdb2173a66485b98d4890a3671d64c7e833484b4 SHA-256: 9167033ea65977d049c86677cdf372094b712ca07b78957738596bdb1f43ba9e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and other PDF files, all promoting free game hacks and cheats. The primary redirector URL is http://netcdn.tw/app/479516143/minecraft-mac-free-game-hack, which is flagged as malicious. The document body and embedded links suggest a social engineering lure to trick users into downloading potentially harmful content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/479516143/minecraft-mac-free-game-hack In PDF document text
    • http://razredna-nastava.net/files/awesome-roblox-outfits-for-free_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/redline-roblox-hack-booga-booga_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-free-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-backdoor-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/como-hackear-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-tiktok-famous-free_GM835599320.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-2021-cheats-flying_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-hack-attack-wiki_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-robux-without-human-verification_GM431946152.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_off000033be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33BE 22652 bytes
SHA-256: 581114b285e355ff50567d684f8da3c5a362c12b33c1748041c6d53ba5fecf6e
font_01_sfnt_off0000662d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x662D 17856 bytes
SHA-256: cc1e3add4a04a98446b1b55314af2162444863ccaf169a3449495116b9daf471

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