Malicious PDF — malware analysis report

Static analysis result for SHA-256 acafcf539fc58b3e…

MALICIOUS

PDF

30.2 KB Created: 2021-07-20 23:23:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fe21e4bc6ac1bc7db818e37a33f6795c SHA-1: e0b1d3ce0b56f789cc78e305242c2c902d35acc7 SHA-256: acafcf539fc58b3e03214ea94ea801df1f31a0c5736a9c15b717ae2acbf8cd07
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'free generator / game hack' which redirects to a known malicious URL. This indicates a phishing or social engineering attack aimed at tricking users into visiting a compromised site. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.0556

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/479516143/how-to-get-a-cape-in-minecraft-for-free-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
font_00_sfnt_off00002347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2347 22500 bytes
SHA-256: b5945248e80d31f424e8d41379e29ebe6856aa0b5d9f8ac1eec4e0900abd6b54
font_01_sfnt_off0000555a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x555A 18052 bytes
SHA-256: 651613c0b0933ea46dfe34ab8437030315119b6d54c219aba7cf9326f75e4fa1

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