Malicious PDF — malware analysis report

Static analysis result for SHA-256 95477aac1649a8e8…

MALICIOUS

PDF

39.8 KB Created: 2021-05-16 12:32:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 0b66dfafa5c95304ca2520744749bf53 SHA-1: 2f5fb7c49744034519417777feab44206167a214 SHA-256: 95477aac1649a8e8ad38328e7250675da628993f29512e8286d938f48b40195d
92 Risk Score

Malware Insights

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

The PDF file contains a lure for free game currency, presenting a fake CAPTCHA and a download button to trick users into clicking an external URL. This URL leads to a website that likely hosts further malicious content or redirects to a scam. The document body and heuristics strongly indicate a social engineering tactic to drive users to a malicious site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/431946152/how-to-earn-robux-for-free-2021-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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3376 25180 bytes
SHA-256: 6b6ea8ab3628bd0916a3973c3ceaf3e33d214441093195958fb36f25c93782d8
font_01_sfnt_off00006dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDE 3000 bytes
SHA-256: bb6369f5663d97f56956f2e274a5064d5090c597e454183226c0fdd763839f99
font_02_sfnt_off00007842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7842 18808 bytes
SHA-256: 177d88bc60daff4309aceb58336b2ba1d1983158bcd2aa353c0aa46f075a8142

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