Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a6cd368d4a1b4d7…

MALICIOUS

PDF

35.8 KB Created: 2021-05-17 21:01:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: c80efe704d597cf0a593fd79dfed5188 SHA-1: f335213afc70a6a8d7c930c49e15b801c8b8a4b4 SHA-256: 8a6cd368d4a1b4d7bdff907939199c8426ded28869c79b949b6c5107d6aa1afd
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains heuristics indicating it is a lure for a game hack generator, linking to known malicious redirector infrastructure. The document body contains text such as 'Coin Master Free Cards' and 'CLICK HERE TO ACCESS COIN MASTER GENERATOR', reinforcing the lure. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0265

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-cards-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_off000032f4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32F4 25032 bytes
SHA-256: 1adeea5c22151e3e69a1d8534a7d866d28e181d880de12f0bbbd6d82d1955fc5
font_01_sfnt_off00006bae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BAE 17884 bytes
SHA-256: dce98ab1a9f6331dfaabbdd57dacdba92c66b57249d10e9c2a1df39138c2a47b

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