Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1593c2e0db4ef72…

MALICIOUS

PDF

29.9 KB Created: 2021-07-21 16:01:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 801f98c339611af465fab8e7c15d0b90 SHA-1: d9cf80b72c20cc4eedc1582a0250f427eed2d127 SHA-256: c1593c2e0db4ef72dccaf7d720faaf1d99d62545732da788965d7b07378c382f
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple heuristics indicating it links to malicious redirector infrastructure, specifically advertising a 'free Minecraft Java Account' and 'game hack'. The embedded URL, http://netcdn.tw/app/479516143/free-minecraft-java-account-game-hack, is identified as malicious. While no scripts were extracted, the document body and heuristics strongly suggest a phishing or scam attempt, likely leading to further malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier clean score 0.0560

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/free-minecraft-java-account-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_off00002305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2305 22240 bytes
SHA-256: d9202aa233281e12b977fd30cfbdbf17797916083fa1dcb60aa247f1addd3b14
font_01_sfnt_off00005415.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5415 18128 bytes
SHA-256: ad2a0848393495eee102bd1b36be1bc15cd9afc8a8e02692ab65cad6db8d4212

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