Malicious PDF — malware analysis report

Static analysis result for SHA-256 b478726c31c81e76…

MALICIOUS

PDF

32.3 KB Created: 2021-07-21 03:13:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 92c04bdc14ed86ff7fffc59239e2d80f SHA-1: d5e4655713f8dbd50037f366765dbf82ef030fdd SHA-256: b478726c31c81e763a9be6fd9c12be10675938a8be57534c80ec0467a3ce2e21
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a 'free generator / game hack' lure, specifically mentioning Minecraft. This is a common tactic to entice users to click malicious URLs. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the redirector URL, which likely serves as a gateway to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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-bedrock-free-game-hack In PDF document text
    • https://schneider-und-berger.de/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://schneider-und-berger.de/images/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://schneider-und-berger.de/images/free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • https://schneider-und-berger.de/images/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://schneider-und-berger.de/images/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • https://schneider-und-berger.de/images/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • https://schneider-und-berger.de/images/get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • https://schneider-und-berger.de/images/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • https://schneider-und-berger.de/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://schneider-und-berger.de/images/free-coins-and-spins-for-coin-master_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_off00002990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2990 22748 bytes
SHA-256: 3b30e6070c029ead1211dc4a39d447cafef7867f1bddc12a52b7754171d2fb4a
font_01_sfnt_off00005c5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C5B 18268 bytes
SHA-256: 421dc37018d5e6f1467ffbccbacebf5894202cb157ac672e86022266516fa266