Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d5f5c8e4a0899a2…

MALICIOUS

PDF

37.3 KB Created: 2021-05-12 00:34:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 40c5e9acc8284c503298d512571ba093 SHA-1: cbda3c36be4a77301d3c9e3cc85ff69f744bcfb8 SHA-256: 5d5f5c8e4a0899a21c2f10c2f4d4377bcb847394716f6ae72f30b5cd28215674
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document employs a social engineering tactic by advertising a 'free generator / game hack' for Minecraft to entice users. It contains a high-risk heuristic firing for a game hack redirect lure, pointing to a suspicious URL. Additionally, the 'ClickFix' heuristic indicates the document instructs users to manually execute commands, likely to bypass security measures. The embedded URL is the primary indicator of a malicious redirect.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

Heuristics 5

  • 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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/479516143/minecraft-multiplayer-free-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000036fd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x36FD 25648 bytes
SHA-256: 014a77608adfdcd225d543e5df39ac798870e8264489d08515476798b70837f1
font_01_sfnt_off00007119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7119 18136 bytes
SHA-256: 22c65de64af2721f6fc37241b86838ece151de043079d0e804f5da14bd34918b

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