Malicious PDF — malware analysis report

Static analysis result for SHA-256 c89eb9137075225e…

MALICIOUS

PDF

35.9 KB Created: 2021-05-21 11:25:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b3341a3b397a1343bd0fb46c425769e9 SHA-1: e95652a8d70bf8d1a25929c954ad557282cce5d4 SHA-256: c89eb9137075225e9ab52d819c8b320843bcd3b1663af24baa62bb2028852b96
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors, specifically promoting 'free Robux' and 'game hacks'. The document body text and heuristic firings confirm the intent to lure users to a malicious website via these links. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8925

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/get-me-free-robux-game-hack In PDF document text
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/how-to-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • https://collectrobuxIn 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
stream_002_off00002eef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EEF 25928 bytes
SHA-256: 03aa3cf8c882399986a51e2bd1fc5efc11fefacbcbd75abf500d378dad60b596
font_01_sfnt_off00006b17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B17 18312 bytes
SHA-256: e3f176f8735a7a9c211288ec5f3dfc0a25536bb398bd4870e4b297ba4f960079

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