Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4d477bb9a47ccfd…

MALICIOUS

PDF

28.8 KB Created: 2021-07-18 23:40:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 32a48e35b8cd21304f16699c18a0466d SHA-1: d7f2a9cb16be21b20fed089b459fe96ce1c36263 SHA-256: f4d477bb9a47ccfddf072417e6261d7b3949460476d339beef3bf76706032656
130 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to known malicious infrastructure, specifically advertising a 'free generator / game hack' for TikTok. The document body and heuristics indicate a lure to trick users into clicking these links, likely to download further malware or redirect to phishing sites. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit vulnerabilities or trick the user into execution.

Machine Learning

  • Nyx PDF Classifier clean score 0.0373

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/835599320/free-fans-on-tiktok-game-hack In PDF document text
    • http://phenomventures.com/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
font_00_sfnt_off00001e4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E4B 22692 bytes
SHA-256: 9aab78215c902f003842621ca32c5297b49146aa86ce0c8720055c9934e4d8fb
font_01_sfnt_off000050c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50C2 17684 bytes
SHA-256: c4bad94708efb6699dc1c2f19668affdeb9abfa27890915707a4ba319d25bbbf

Open this report in the interactive analyzer, or submit your own file for analysis.