Malicious PDF — malware analysis report

Static analysis result for SHA-256 390ae345644799c8…

MALICIOUS

PDF

36.0 KB Created: 2021-05-11 13:34:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9c7835fbad61377f8ca9e32c9b749021 SHA-1: 0b909a8a542c353fdd36ad8a695945d8899560fe SHA-256: 390ae345644799c85ba7c07e488f46a7bdd9748ca1e106805eb5d4418fe61c88
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 or private keys, combined with a high-risk heuristic for a 'free generator / game hack' redirector lure. The document body explicitly mentions 'Apk Coin Master Hack' and includes a call to action to access a generator, strongly suggesting a phishing or scam attempt to steal credentials or game-related secrets. The embedded URL leads to a suspicious domain.

Machine Learning

  • Nyx PDF Classifier clean score 0.0243

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/apk-coin-master-hack-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_off00003222.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3222 25232 bytes
SHA-256: decf6aad6e09e8bd57322cb9fb61b3a30ef2ea4d1e8d6da2724ca43bd8e2d629
font_01_sfnt_off00006c80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C80 17892 bytes
SHA-256: 10848dcb94fa8ef52647dff51f313a82fe0a75c442c4a6ae41e72789ca7f1d9e

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