Malicious PDF — malware analysis report

Static analysis result for SHA-256 e86dbaf349c5c0cf…

MALICIOUS

PDF

36.0 KB Created: 2021-05-13 04:35:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 3c6bbeba777a8304c45c0ca4aa042f88 SHA-1: 3449890c9370638fd7d9a5311d1f464a84461192 SHA-256: e86dbaf349c5c0cfcb8929c8a9f6e6d4e74bb54b2f84ca9b7fcd603d527afe7d
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains heuristics indicating it links to malicious redirector infrastructure, specifically promoting a "free generator / game hack" for Coin Master. The embedded URL leads to a known malicious domain, suggesting a phishing or scam attempt to redirect users to potentially harmful content or further malicious sites. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

Machine Learning

  • Nyx PDF Classifier clean score 0.0243

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-game-hacks-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_off00003312.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3312 24916 bytes
SHA-256: 54088960f5e34aff16b07b9e2dcffe74304e5fde832d4c0dbd83dfd70b75a8d4
font_01_sfnt_off00006c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C50 17976 bytes
SHA-256: 4c1d26c1fb4feed8092d99a8761960172faa49b0c213e7324f16c91828cd6f14

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