Malicious PDF — malware analysis report

Static analysis result for SHA-256 8863ab815097abbc…

MALICIOUS

PDF

38.0 KB Created: 2021-05-12 00:21:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 21924b668c5d39850db236a8e7a5713e SHA-1: 7c8719117d6855e68b200edc2f15e92bf7bf3160 SHA-256: 8863ab815097abbce49c85ab285cebedd9ff536cf9d5f39fbb9a754860ceb7fe
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links and text that mimic a 'free generator' or 'game hack' lure, specifically mentioning 'Free Spins In Coin Master'. It also includes a call-to-action button, indicating a phishing or scam attempt. The primary malicious URL identified is associated with known malicious redirector infrastructure.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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/free-spins-in-coin-master-without-human-verification-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_off0000386c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x386C 24892 bytes
SHA-256: e79d33199dffbe89caa68db4373aafad539d20e28a0c0eeb3516ad3c3d1a3e01
font_01_sfnt_off00007205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7205 18784 bytes
SHA-256: 2f08f52b73595fa95dbe25467555bd1443f7cdd3e7404a9db3231e6e64119a30