Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7ec2eb34bb6d4f1…

MALICIOUS

PDF

37.6 KB Created: 2021-05-11 19:01:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 86d93c82f789e9945413519811262ca4 SHA-1: 481ae1b748e7a491cd14d52cfd4581bcb6c5b655 SHA-256: a7ec2eb34bb6d4f1c7f9ac2e3fedf4fa38c2cb0c0f2fe59e9c22227c10b260e1
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, masquerading as a "Coin Master Free Spins Link 2021 Today" generator. The document body and heuristics indicate a lure to a game hack generator, which is a common phishing tactic. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, and the heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' suggests potential for malicious code execution or redirection.

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/coin-master-free-spins-link-2021-today-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_off00003630.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3630 25384 bytes
SHA-256: 6ba65907663a1a70a789594c24fad9ae868f11f5d85123d883af375b5f52db1e
font_01_sfnt_off00007002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7002 18812 bytes
SHA-256: 705c5903f824403b328e8e9dbd2ab52a650d097fc3c0d4bbd34be772086d041a

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