Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6c7a39a09fa149c…

MALICIOUS

PDF

37.7 KB Created: 2021-05-11 15:13:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 456ec43a0ccfc090c7a11388ed6ef06b SHA-1: de8e3f7bf92f9336ee7f5d899bcc2d99f9d1727a SHA-256: f6c7a39a09fa149c25b60c68945b82bd5acd1fefe0c00d88a7696e9ac3fa3b54
70 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded text and a link that strongly suggests a lure for a game hack. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms that the embedded URL leads to known malicious redirector infrastructure. The document body also contains text related to 'Coin Master Hack' and a call-to-action phrase, further supporting the phishing attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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/coin-master-hack-10.2.1-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_off0000380f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x380F 25700 bytes
SHA-256: 54a8f7b7c2df54897ef2d98c4babac772b25e70338130ebf251f9d43a78e763f
font_01_sfnt_off00007249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7249 18184 bytes
SHA-256: d583644d915bd171f19add23b0833aca52e77891297bd05357916fb27d6d46c1

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