Malicious PDF — malware analysis report

Static analysis result for SHA-256 d894808082f03b50…

MALICIOUS

PDF

31.4 KB Created: 2021-07-21 05:54:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 86358cbed217ad11d5a671484dc981a9 SHA-1: 18aceb519ae2f186280f6712f4c2e481ce148ef7 SHA-256: d894808082f03b50580c3cae9dcf90b3a9c96769558624e7e656226f23b577de
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link that redirects to known malicious infrastructure, specifically advertising a "Coin Master Free Spins Link 2021" and a "game hack". This lure is designed to trick users into visiting a potentially harmful site. The embedded URL is the primary indicator of malicious intent, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0580

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 http://netcdn.tw/app/406889139/coin-master-free-spins-link-2021-game-hack In PDF document text
    • 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_002_off00002447.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2447 23192 bytes
SHA-256: eb8382a6922e506f8373af377bc9ff3a266235371cd282d960f50104781a5296
font_01_sfnt_off0000589b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x589B 18456 bytes
SHA-256: 405c435adaafa0da304b7a4986d8f56c56dc87ed278d5cff2ac0c57977d8d7e3

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