Malicious PDF — malware analysis report

Static analysis result for SHA-256 b60919b8aab8fb45…

MALICIOUS

PDF

40.0 KB Created: 2021-05-10 16:02:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: fa7e2b7290fad0a6adfbc8c79a4e6959 SHA-1: ecb9f1be30be523f5f75746619534e7bd41a16da SHA-256: b60919b8aab8fb45b6b5f4ffdbe1296d9a1f03f666a96dde2f1dff754ab31374
70 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to a known malicious domain, disguised as a lure for game cheats. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms this malicious redirection. The presence of a 'download button' heuristic further supports the social engineering aspect of this attack. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

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/freegames911.com-coin-master-tips-and-cheats-2021-free-coins-and-spins-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_off000034b7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34B7 30760 bytes
SHA-256: fd5284fe786fc01b567ccadb49b996209b4dcfba81503f360720466881aee5f0
font_01_sfnt_off00007813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7813 19440 bytes
SHA-256: d21e09e6d84846a171b344f261e29994bfe04b5ec0080f7ce55354125b7c97ed

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