Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4b8bdbbdf44cdd5…

MALICIOUS

PDF

35.9 KB Created: 2021-05-12 03:40:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0e24592e044994795307fc055d52a1ab SHA-1: 9e8ed799058ee23682d02f5c01a7f7441264df7f SHA-256: e4b8bdbbdf44cdd50c8b51ed9620c305a77fbf7f03109f5f6d4c1468aacc044a
70 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link disguised as a download button, directing users to a URL associated with known malicious redirector infrastructure. The document body text and embedded artifacts suggest a lure for a game hack, likely intended to deliver malware or facilitate a scam. No scripts were extracted, but the presence of a malicious redirector is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.0265

Heuristics 3

  • 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 https://netcdn.xyz/app/406889139/hack-coin-master-3.4.3-apk-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
stream_003_off000033ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33EF 24332 bytes
SHA-256: 97b4d558f4e340aa70452478ed851e6d0124087ef4b3a6e4a41ab68e7c4e2177
font_01_sfnt_off00006b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B2E 18196 bytes
SHA-256: c3b275253d9351e2e74b82a9dafc4156583904968b89422ea15a6a95515ae557

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