Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf031757c86070e4…

MALICIOUS

PDF

28.8 KB Created: 2021-07-22 01:22:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cc160d99c9e833805e03c7f2d9516954 SHA-1: 7f8b35c1b78d3902bced0470d0226222ef3a6f9f SHA-256: cf031757c86070e436d0c4973991591e8b89f0434dd924ee9c7b19722ff8dcde
130 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting a 'free generator / game hack'. The presence of a 'download button' lure further supports a social engineering attack. While no scripts were directly extracted, the PDF structure and malicious links suggest an attempt to exploit vulnerabilities or trick the user into downloading a secondary payload.

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/479516143/free-minecraft-mods-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000020a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20A1 21756 bytes
SHA-256: 3777475ebdba0f48e35461d753d6ea0363cc74c1809d272618bf2eec26324c1b
font_01_sfnt_off0000503c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x503C 17884 bytes
SHA-256: adaa6c4c94b3243dd254ffbddf76305537cf905bb6459c29a6343236798c761b

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