Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c5110827726464c…

MALICIOUS

PDF

39.8 KB Created: 2021-05-11 19:42:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: eb5e546d527a415390488eb845e5fe16 SHA-1: a98638fa6411d64066de7a4de198a1669d32e2db SHA-256: 1c5110827726464c52df4e3f9d6488ae2df90a50e49c119944cbb3e74dd39048
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically advertising a "Coin Master 70 Spin Link Game Hack". The document body also contains a call-to-action phrase, "CLICK HERE TO ACCESS COIN MASTER GENERATOR", further reinforcing the lure. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-70-spin-link-game-hack.

Machine Learning

  • Nyx PDF Classifier clean score 0.0127

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-70-spin-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_off0000341e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x341E 26280 bytes
SHA-256: f93bc8480f50830a947cf0204c56d69c1ee5d42cb932318bb07a2b66093a9af6
font_01_sfnt_off0000707c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x707C 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00007a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A66 18120 bytes
SHA-256: cf85675b6a38e731fca5e28061fbf46a28a3be773b5a4bb5d31cd4a045e3febb

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