Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c94714effc60f1e…

MALICIOUS

PDF

29.9 KB Created: 2021-07-19 20:30:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ecb088877224c12e9cce06d9a0b1be82 SHA-1: 0fe5302a7d5d371485fb8891e5e570403b987007 SHA-256: 9c94714effc60f1e85f83d143bde055526c2ebbfdc55686fce8454e9c63d4355
160 Risk Score

Malware Insights

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

The PDF contains multiple links pointing to known malicious redirectors, specifically advertising a 'free generator / game hack'. The document body, though heavily obfuscated, contains similar lures and URLs. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect the user to potentially harmful content or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8523

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/create-minecraft-server-free-game-hack In PDF document text
    • http://pastoraldapessoaidosa.org.br/images/free-tiktok-followers-no-survey_GM835599320.pdfIn PDF document text
    • http://pastoraldapessoaidosa.org.br/images/how-to-get-free-tiktok-followers_GM835599320.pdfIn 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_off000022c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22C2 22492 bytes
SHA-256: fd3a355e1076cb3ffeebfae00f98c22ebab632ffffbd8c199201ff850bdbf5a7
font_01_sfnt_off00005505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5505 17684 bytes
SHA-256: 739dfd09c5bedc98bb46a6c5718dfc06afa6391c84dc1b066bb71172f329b46c

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