Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3e6716cdead46f1…

MALICIOUS

PDF

35.9 KB Created: 2021-05-11 18:37:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7a198d64e5c53d3a8da17d5896a396cb SHA-1: 706c9feda234bedf12034ecf8453cc70b49a029c SHA-256: f3e6716cdead46f12a22547dcdd18f014b063a958c4dda3fcbb8f936daa1ff79
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links and text explicitly promoting a "Coin Master Hack" and a "generator", directing users to a known malicious redirector URL. This indicates a social engineering lure designed to trick users into visiting a potentially harmful website, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.0282

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 https://netcdn.xyz/app/406889139/coin-master-hack-without-verification-ios-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_off00003483.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3483 23876 bytes
SHA-256: 1da3806391b343f69745b51d9dc03a25583ad2ee5a14cf3e86debdf703277913
font_01_sfnt_off00006ac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC7 18356 bytes
SHA-256: b6c43d10bb82ae062f6a0e78c5dce43c54f6cf4770e0595f07160b7cc6226d33

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