Malicious PDF — malware analysis report

Static analysis result for SHA-256 dea59275cb2519c5…

MALICIOUS

PDF

38.9 KB Created: 2021-05-17 21:38:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f9f7d7e05690d188a906cea172bbcb6e SHA-1: 6aa87bca01439ec60db0cecee5bf506894fa1c68 SHA-256: dea59275cb2519c516693af93ea4d064cda18ddba641c8a402bb93a0e97bbee8
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing indicating it links to a malicious redirector disguised as a game hack generator. The embedded URL, https://netcdn.xyz/app/406889139/free-spin-coin-master-game-game-hack, is the primary indicator of malicious intent. While no scripts were explicitly extracted, the PDF structure and the nature of the lure suggest it's designed to trick users into navigating to a potentially harmful site, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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-spin-coin-master-game-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003254.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3254 25084 bytes
SHA-256: d9da8c97ad664922c906aafefae154bf0c9532f32df46c59299622ac6199acd2
font_01_sfnt_off00006c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C28 3124 bytes
SHA-256: 9967c6221325a4ff3f7c4336922605f990450164c2eee2df708cc81823c6ec98
font_02_sfnt_off00007706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7706 18148 bytes
SHA-256: 05f474a5dd778b1a8f82bb3f3194e0f6909204339d3dcef5442e6da61b36e890

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