Malicious PDF — malware analysis report

Static analysis result for SHA-256 85ffaf1f5a003da4…

MALICIOUS

PDF

32.8 KB Created: 2021-07-19 20:15:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 34d706944475f712419b6705feb4c777 SHA-1: a7d049343c98e44d4bc663f30399aad6d341175b SHA-256: 85ffaf1f5a003da4319a80d294a0cc0ae11d5edc8dae50c322729e7aa51ce1c7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, which is designed to lure users into clicking on deceptive content like 'free generators' or 'game hacks'. The document body explicitly mentions 'Play Minecraft For Free' and 'CLICK HERE TO ACCESS MINECRAFT GENERATOR', reinforcing the lure. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

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/play-minecraft-for-free-game-hack In PDF document text
    • https://www.similar.com.tw/upload/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/tiktok-free-fans_GM835599320.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/rbx-gg-free-robux_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_off00002cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CC6 22412 bytes
SHA-256: d48e0479430aa3d645c5de590d7f359b0ab9a8f6463836ae7a2efe33eb0e0837
font_01_sfnt_off00005e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9F 18116 bytes
SHA-256: 58506b39f0592aa293a22e76cdd5d8324130a94bf097dc81d26ff216ea8060f4

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