Malicious PDF — malware analysis report

Static analysis result for SHA-256 684e98838654d670…

MALICIOUS

PDF

33.4 KB Created: 2021-07-19 11:55:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 2443ca516dc42fa4aea16bfbe3d55166 SHA-1: 78ed81199495c8cd5eab2341c056544a371f0c27 SHA-256: 684e98838654d670c7d3dc10ba5902d561945ad56557f0d3a9e5437684803601
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that are designed to lure users into clicking on links related to game hacks and free in-game currency. The primary URL, http://netcdn.tw/app/406889139/coin-master-free-coins-game-hack, is explicitly flagged as a game hack redirector. The document body also contains phrases like 'CLICK HERE TO ACCESS COIN MASTER GENERATOR', reinforcing the deceptive nature of the content. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 4

  • 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 http://netcdn.tw/app/406889139/coin-master-free-coins-game-hack PDF link annotation
    • http://sv-nahetal.de/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://sv-nahetal.de/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://sv-nahetal.de/images/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://sv-nahetal.de/images/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • 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_002_off00002da3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2DA3 23292 bytes
SHA-256: a1c3a13845dc7935dd62e5297a90288aa00c5608053690d9e377a5b53725800b
font_01_sfnt_off0000626e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x626E 17712 bytes
SHA-256: 0afd6f2792edb83b7f2a0201a1e0a5eb12ca81ad868fb3e42742340ee6e5fb0e

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