Malicious PDF — malware analysis report

Static analysis result for SHA-256 753e94160d671a44…

MALICIOUS

PDF

33.3 KB Created: 2021-07-19 13:22:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 579730a08a13cf517983769a4bb93f8b SHA-1: bd44f792132438bd05fbf97ae2d8de7e09b0d9ba SHA-256: 753e94160d671a442fd78de11d625bacec76c273d5e64b7c9a82491363bb03e5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to known malicious redirectors, disguised as offers for free in-game currency. The primary lure, 'free-coins-on-coin-master-game-hack', directs users to http://netcdn.tw/app/406889139/free-coins-on-coin-master-game-hack, which is flagged as malicious infrastructure. The document body and embedded links suggest a social engineering tactic to trick users into visiting these malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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/free-coins-on-coin-master-game-hack In PDF document text
    • http://reisebild.eu/images/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://reisebild.eu/images/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://reisebild.eu/images/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://reisebild.eu/images/mine-minecraft-games-for-free_GM479516143.pdfIn PDF document text
    • http://reisebild.eu/images/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • http://reisebild.eu/images/tiktok-follower-bot-free_GM835599320.pdfIn PDF document text
    • http://reisebild.eu/images/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://reisebild.eu/images/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://reisebild.eu/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://reisebild.eu/images/coin-master-links-free-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_off00002cf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CF2 23400 bytes
SHA-256: b081c72f0cf56763a361c00a129a80e568d3385750fda9e38dd6f002c54866cd
font_01_sfnt_off000061f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F5 17712 bytes
SHA-256: 6ea46f87f2167b805a87cbef3ad9b5ecf4d2513d7b8c5fe933be1d22f28e2546