Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a4349f881b1c06e…

MALICIOUS

PDF

35.6 KB Created: 2021-06-10 23:03:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 657b668b5b77806d7f4db4e9dea045c7 SHA-1: d330b44dc6da55a872e9e9bd6398728cb0ae8cfb SHA-256: 9a4349f881b1c06ea64ff34a5c198b8c642082bcd47f5d0d73b2a92173a8dc68
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a critical heuristic firing for a game hack redirect lure, pointing to malicious infrastructure. The embedded URL and document body text reinforce this, indicating a phishing attempt to trick users into visiting a malicious site. While no scripts were directly extracted, the nature of the lure suggests potential for further exploitation.

Machine Learning

  • Nyx PDF Classifier clean score 0.0265

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.tw/app/431946152/hack-roblox-dl-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_003_off00002f39.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F39 26916 bytes
SHA-256: 6abe9e33033d19ed08270ee138d5f66ea525a41db9176d03fbcf4cbbb3ab638f
font_01_sfnt_off00006c18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C18 17436 bytes
SHA-256: 7bf53f5c692a76fa3b7e16e56443355839b1fa14bbb673447689ea13ecb58ffb

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