Malicious PDF — malware analysis report

Static analysis result for SHA-256 49587ac6f91c5bea…

MALICIOUS

PDF

37.1 KB Created: 2021-05-10 11:11:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3f874661dba8adec968e32877819eb9e SHA-1: 8fa2d7080f9b139ce84279063afdeeacde2f9350 SHA-256: 49587ac6f91c5bea887058dfd1e1f59abb2ba0aacc479be16c0772c5a024cd03
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically advertising a "Coin Master Free Account Game Hack". The document body also contains explicit calls to action like "CLICK HERE TO ACCESS COIN MASTER GENERATOR", reinforcing the lure. While no scripts were directly extracted, the PDF structure and embedded links strongly indicate a social engineering attack aimed at driving traffic to potentially malicious sites.

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-account-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_off000035c8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35C8 25940 bytes
SHA-256: e5f700accef6ff9fd9b0f13fe65767cb565f3ea505f8a6e947c057bd5573f7b4
font_01_sfnt_off00007134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7134 17848 bytes
SHA-256: 81db58af0d0a7c54bfcbf00b0a30aba5f5662412ae545e00ecca40055587a372

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