Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d89578f82e1a130…

MALICIOUS

PDF

43.2 KB Created: 2021-05-21 15:13:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 949b47956e5d3600425e2d8610dc43c2 SHA-1: bf33412d530d30b1b7f4ea8046733bf58380e821 SHA-256: 8d89578f82e1a130479333f9aafcd4038f3addb739c9c463f719f7b4350d2bde
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, masquerading as "free generator / game hack" lures. The document body explicitly mentions "Free Robux Youtube" and includes a "CLICK HERE TO ACCESS ROBLOX GENERATOR" call to action, reinforcing the deceptive nature of the content. 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 0.9541

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 https://netcdn.xyz/app/431946152/free-robux-youtube-game-hack In PDF document text
    • http://reisebild.eu/images/roblox-c9m_GM431946152.pdfIn PDF document text
    • http://reisebild.eu/images/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://reisebild.eu/images/free-coins-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://reisebild.eu/images/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://reisebild.eu/images/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000332a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x332A 38184 bytes
SHA-256: f9339511ce8926f906f87238db52abc47b44a9b8a1e6dae12767e4ec5e2c2854
font_01_sfnt_off00008821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8821 18280 bytes
SHA-256: de5b074060e7ee0fa0230ac6212805924cd4a5679e09505111534b28358c176b

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