Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb39ad3696a5762f…

MALICIOUS

PDF

33.0 KB Created: 2021-07-19 08:40:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cae5cbc54160ad12a1bb9d537ee18270 SHA-1: 9253a7959e41a879944e5876f0a88fb0bd5534f3 SHA-256: bb39ad3696a5762f39d024be8c79d4c06a91207cbfd2cfc6e7d54fa687911cf8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and game hack lures, indicating a phishing or scam attempt. The embedded links are designed to lead users to potentially malicious websites, likely for credential harvesting or further malware delivery. The ML classifier also strongly flagged this PDF as malicious.

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/how-to-play-minecraft-for-free-on-pc-game-hack In PDF document text
    • http://krumerhaus.at/images/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • http://krumerhaus.at/images/free-tiktok-followers-app_GM835599320.pdfIn PDF document text
    • http://krumerhaus.at/images/how-to-get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://krumerhaus.at/images/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://krumerhaus.at/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/get-free-robux_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://krumerhaus.at/images/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://krumerhaus.at/images/how-to-hack-minecraft_GM479516143.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_off00002c40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C40 22800 bytes
SHA-256: 7d342cce8af7e9d5ae363210ed377883b0b3dabfb9cf92b05dc8a551cff6b695
font_01_sfnt_off00005f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4F 18284 bytes
SHA-256: 805db6617afe2d237489c8bb7c2b5cc2832d34670fdae12a8b82fd0acde92e0c

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