Malicious PDF — malware analysis report

Static analysis result for SHA-256 c943b9291ae6415f…

MALICIOUS

PDF

36.0 KB Created: 2021-05-16 01:02:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c6e4def54cc54849b3ca1dd58ef398fc SHA-1: 6681f5f28db25155563cde0142ad389c999ddaa1 SHA-256: c943b9291ae6415fba54cb8bd3ea0e9bd31cbe75fd4613cb8ca1b73863589884
112 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for requesting recovery secrets, combined with a high-signal heuristic for a game hack lure. The embedded URL points to a site offering "free daily spins" and "game hack" generators, strongly suggesting a phishing or scam attempt. The document body also contains "CLICK HERE TO ACCESS COIN MASTER GENERATOR", reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.0265

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-daily-spins-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000031e0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31E0 25552 bytes
SHA-256: 858b4af14c82b42ec0791a6d444e9145cd5f34ec7c4c95f68e745ed48968b133
font_01_sfnt_off00006b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B34 18308 bytes
SHA-256: 5c3cefeee4a209382fad51155f4ab19c665f35dca270fe96ae1b58d23c3d8f95

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