Malicious PDF — malware analysis report

Static analysis result for SHA-256 12d63a30d230509a…

MALICIOUS

PDF

35.2 KB Created: 2021-06-22 04:16:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bee77e8a5da1aff5d06496b3fc0a5641 SHA-1: 0d4d684b3413fa526d35a5006c3a7d1404785e88 SHA-256: 12d63a30d230509a507d637d9f1005427d663fc7dad89ae36f11d9cdb7e4e98c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, disguised as 'free generators' or 'game hacks' for popular games like Roblox and Coin Master. The document body explicitly mentions 'how-to-get-free-robux-without-human-verification-game-hack' and directs users to the malicious URL. This indicates a phishing or scam attempt, likely to lead users to further malicious content or to harvest credentials.

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-get-free-robux-without-human-verification-game-hack In PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/coin-master-get-free-spins_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/pokemon-go-free-2021-tier-list_GM1094591345.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/how-to-hack-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/coin-master-apk_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/bloxburg-roblox-how-to-get-multiple-floor-free_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/aternos-free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/pokemon-go-free-items_GM1094591345.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/coin-master-apk-mod-free-download_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/free-coin-master-coins-and-spins_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_off00002fcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FCB 22660 bytes
SHA-256: 93009f3825e561942665987e3a1b3a6782bf30e0d381e70159f8c05f11c9879e
font_01_sfnt_off00006252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6252 19860 bytes
SHA-256: 495fe8ab67ccc92980b130970b14ca59a4055a895de5252c8ccba287623abf67

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