Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f3e231f30059128…

MALICIOUS

PDF

27.6 KB Created: 2021-06-26 16:20:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 721baea27d00d7fd59ddac79ed45a760 SHA-1: 7a5339da4b420c5e6d35af11aa2a5d1c0a16be78 SHA-256: 9f3e231f3005912851b2772bc3671f7f6857274c1fecc033bc076b33c435fa0f
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic indicating it links to a malicious redirector disguised as a game hack generator. The document body and embedded URL reinforce this lure, aiming to trick users into clicking the malicious link. No scripts were extracted, but the primary attack vector is the malicious link designed for user interaction.

Machine Learning

  • Nyx PDF Classifier clean score 0.0330

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.co/app/431946152/gamefreaks-free-robux-game-hack In 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_001_off00001678.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1678 22240 bytes
SHA-256: 6e02e7def747d6abe9e5473850bcb240f13161d6e12feb227bc6ecaf58f31e74
font_01_sfnt_off000047c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47C1 19148 bytes
SHA-256: c86621f3289265e1473c38f278922d113d722a07b4c938cbe5ebb770a4f25cac

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