Malicious PDF — malware analysis report

Static analysis result for SHA-256 b50352f53ef5f19d…

MALICIOUS

PDF

33.0 KB Created: 2021-05-23 12:24:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 374cf4d0e3e645dc1de91c9e49a3ff19 SHA-1: 548465dbffdd897f9d48ddc2758c25787c6bc8c8 SHA-256: b50352f53ef5f19dad7b91f31c3156ab73dafbffd282e2cee44cd9437176d81c
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link disguised as a 'free generator / game hack' which redirects to the URL https://netcdn.xyz/app/835599320/free-tiktok-accounts-game-hack. This URL is flagged as malicious redirector infrastructure. The document also contains a call-to-action button, reinforcing the lure. The presence of embedded JavaScript suggests potential for further malicious actions beyond simple redirection.

Machine Learning

  • Nyx PDF Classifier clean score 0.0622

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/835599320/free-tiktok-accounts-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_002_off00002776.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2776 25120 bytes
SHA-256: 94d034f548608e1c0273b69bc2d7d7c98afacee5431e56ad1fd0b7d6b7030089
font_01_sfnt_off000061e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E8 17596 bytes
SHA-256: 78bf98ee26562f259e5df0f7ea395c63cf95895c72ff2901d5340c85fa588773

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