Malicious PDF — malware analysis report

Static analysis result for SHA-256 18d140656d225474…

MALICIOUS

PDF

34.1 KB Created: 2021-06-20 18:54:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d9fa78efc60ff8ca6a8bfe24923cd673 SHA-1: 72511237b026dd863967f88eae8063c7a714b8de SHA-256: 18d140656d225474ac7f483621f9c8119b500e5ce3a1d09b586d43e84186df2b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites that are flagged as malicious redirectors, often disguised as 'free game hacks' or generators. The document body and embedded links suggest a lure to trick users into visiting these sites, which likely serve as a distribution point for further malicious activity. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of a malicious workflow.

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-look-cool-for-free-roblox-game-hack In PDF document text
    • http://bgnails.nl/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/not-free-robux_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-fix-cheat-engine-crashing-roblox_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/free-robux-infinity_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://bgnails.nl/images/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/roblox-free-followers_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • http://bgnails.nl/images/free-tiktok-likes-no-verification_GM835599320.pdfIn PDF document text
    • http://bgnails.nl/images/tiktok-followers-for-free_GM835599320.pdfIn PDF document text
    • http://bgnails.nl/images/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/comment-hacker-roblox-pour-des-robux-avec-cheat-engine_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/robux-free-real-obby_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-get-free-robux-2021-generator_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/free-robux-gift-card-codes_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_off00002f8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F8D 22048 bytes
SHA-256: 2e38e9ba251b6aff6eeba63eef64bd4e1b960fe726d7d5af962e3ab64737af70
font_01_sfnt_off0000603e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x603E 18984 bytes
SHA-256: f9ce0ea83c7176deb935c7b7229985b95d5404f1dae1150ae56449baf4846a41

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