Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5b7b63c10f3c371…

MALICIOUS

PDF

36.4 KB Created: 2021-05-22 07:15:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4963d6edac74dc144a592063b13ae2bc SHA-1: 7afa8d909c126dbbfa2297bca4cde5c7a6a530fd SHA-256: c5b7b63c10f3c3711b6439b3a7a14ca2aefd72143676ebf74920abe5bba1022f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' lure, specifically for 'Coin Master Hack 2021'. The document body and embedded links reinforce this theme, directing users to external URLs that likely host malicious content or further phishing attempts. While no scripts were explicitly extracted, the PDF structure itself contains embedded URIs that are indicative of malicious intent, likely to facilitate initial access via social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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 https://netcdn.xyz/app/406889139/coin-master-hack-2021-game-hack PDF link annotation
    • http://dieter-sauter.com/images/easy-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-100-robux_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn 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_002_off000032b0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32B0 25436 bytes
SHA-256: fde218bd825d6a0645ca38f7f40e7d8462e3c8752d4d1d2e4504cfb2de67fa2c
font_01_sfnt_off00006d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D48 18116 bytes
SHA-256: 17974cef81917e5ef69542194afa433aff210173cc902887fbc2b56a9328dd03

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