Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec93d42f041922fc…

MALICIOUS

PDF

37.6 KB Created: 2021-05-10 23:51:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 59906d4779af4ad31fdc7b92c9b03303 SHA-1: 07e30fcff294a51019ff70a5d5e9ab45ff7d97b1 SHA-256: ec93d42f041922fcd441ae2f3f61967552dcd223ed619037cf5c6d58b6e4b4e4
70 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link pointing to a website that appears to be a lure for a 'Coin Master' generator. The document body also contains text related to this lure and a "CLICK HERE TO ACCESS COIN MASTER GENERATOR" call to action, reinforcing the phishing attempt. The embedded URL is a known malicious redirector, indicating an attempt to deliver a second-stage payload or lead the user to a fraudulent site.

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/freespinandcoin.blogspot-com-2021-11-coin-master-free-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_off000035e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35E2 24972 bytes
SHA-256: 6bb1758db9acf6977b01ae43ce61aef7d0705a6013e7975ca107ca52a97af1af
font_01_sfnt_off00006e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E99 19340 bytes
SHA-256: 14ce521359a7158f17c6acd2645c88b11b0ebef116c2a70c2bac94c6f6b86304

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