Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e390de536595ebf…

MALICIOUS

PDF

36.3 KB Created: 2021-05-22 04:39:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3e791f59afcda303ce4742b528f4ae86 SHA-1: 6638fb028a09740d5f6f0c36213e9c0ede7e84a2 SHA-256: 2e390de536595ebfad0d4f3c57003385086327002a3450f6fd0c5dba93903dac
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and references to 'free Robux codes generator' and 'game hack' lures, indicating a social engineering attempt to trick users into visiting malicious websites. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded links suggest it is designed to redirect users to potentially harmful content.

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/431946152/free-robux-codes-generator-game-hack PDF link annotation
    • https://www.ruchya.com.tw/upload/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/how-to-get-free-robux-without-verifying-2021_GM431946152.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_off000033b1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33B1 24544 bytes
SHA-256: 9f5d54a79d3a5ca91f4a6beb46ea96535957448ac919f9c03e89625507682658
font_01_sfnt_off00006be3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE3 18520 bytes
SHA-256: 1c25fc10cbc7d9d0374bcdf27ae43ed9c15c29ea4d1fc113120e8f54655ee57b

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