Malicious PDF — malware analysis report

Static analysis result for SHA-256 7114946b265840a6…

MALICIOUS

PDF

39.9 KB Created: 2021-05-12 10:30:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 3694f91faf41cc11d88c381d29a5d428 SHA-1: b715caeb62e5cf757326b5772954b6af7169dcce SHA-256: 7114946b265840a608fb3bd93e7e0378a89d7a98724c54f75fbb865f44e3c089
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded links that are identified as malicious redirectors, specifically pointing to a "Coin Master Free Spins Link" lure. The document body, though partially corrupted, contains text related to free spins and a call to action to download, reinforcing the lure. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-free-spins-link-game-hack, which is likely used to deliver a secondary payload or lead the user to a scam.

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/coin-master-free-spins-link-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_off00003330.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3330 27088 bytes
SHA-256: c235d033c3ec09a07f137f7249ac4f6770a98a4bd383edb38a785707680aed07
font_01_sfnt_off000071aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71AA 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00007b5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5C 18056 bytes
SHA-256: a4f33549350803e8a819cbfad6b4ff3cdc0b302ceab74af9f2f663eab6bd9ec0

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