Malicious PDF — malware analysis report

Static analysis result for SHA-256 5409ff1b3ad1b67d…

MALICIOUS

PDF

33.9 KB Created: 2021-05-12 06:35:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 14249fb8f5a7e4ddd21ae346a3c255b2 SHA-1: b8976abac4fbdcbe36e68699a6fd3c3ddc9feee8 SHA-256: 5409ff1b3ad1b67da9fdd3d5f7ec6ca3c15d9e80a3e0a1846e05e7d5d7b65627
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links and text that mimic a 'game hack' generator, specifically for 'Coin Master'. The primary link directs to a known malicious redirector infrastructure. While no scripts were extracted, the document's structure and heuristics indicate a phishing or scam attempt designed to lead the user to a malicious website.

Machine Learning

  • Nyx PDF Classifier clean score 0.0319

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-spin-pattern-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_off00002ef1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EF1 23476 bytes
SHA-256: 270d703b421471d03dea30af36f8918ef5a9de03ef41af70ce8001e554159bfa
font_01_sfnt_off00006435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6435 17876 bytes
SHA-256: bd22fd35e13567494ff4a803842d6b5fa952e975cd9e2293b3775db85ba13e50

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