Malicious PDF — malware analysis report

Static analysis result for SHA-256 16ec43fbab725283…

MALICIOUS

PDF

35.9 KB Created: 2021-05-19 06:02:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4c9c38654307242fc3d2dcb960ac2544 SHA-1: 71d625d4e6ca4e399398763e7f4aaa9eb8d5d544 SHA-256: 16ec43fbab7252838608c495aedf24c3f614f96bffa83916ea509c0f6758dff5
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic firing for a 'free generator / game hack' lure, directing users to a suspicious URL. The document body also contains text related to 'Spin Free Coin Master' and a 'CLICK HERE TO ACCESS COIN MASTER GENERATOR' call to action, reinforcing the phishing pretext. The embedded URL is the primary indicator of a malicious redirect.

Machine Learning

  • Nyx PDF Classifier clean score 0.0265

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/spin-free-coin-master-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000330b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x330B 25304 bytes
SHA-256: 8399ed9ac18cbc656a53401971a8141b8eac03f093e3b5f1cdf38e46254066f9
font_01_sfnt_off00006c68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C68 17884 bytes
SHA-256: 62d9ea50f60e8bb2d525932cb0bed6ec72f3825d2169fb999e19ba134a7219cc

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