Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c858a8f303ee106…

MALICIOUS

PDF

29.9 KB Created: 2021-07-20 13:32:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1ffa7a749fa3f97d7d8390f2e07f3941 SHA-1: 2bd7745dc75f4efdcd13d4cb4860c215e6dff015 SHA-256: 7c858a8f303ee1060c2de1c2a7bf8fbfaefd6de3015aadfe3fef9ca950a486c7
130 Risk Score

Malware Insights

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

The PDF document contains a lure for a "Minecraft Pe Free Download" which links to a known malicious redirector. The embedded URL, http://netcdn.tw/app/479516143/minecraft-pe-free-download-game-hack, is the primary indicator of malicious intent, likely leading to a further payload download or phishing page. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/minecraft-pe-free-download-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_off000021ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21EC 22108 bytes
SHA-256: 23e56496a8d6682eb99b20991e2bea31b123f23b8ea438350a1c6001a0cebbe3
font_01_sfnt_off000052bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52BF 18444 bytes
SHA-256: 41511c969eed7dcbefdd8737ff0e878d59d6c8a64165a5defd1345ec3b98e320

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