Malicious PDF — malware analysis report

Static analysis result for SHA-256 1921d774784e8991…

MALICIOUS

PDF

37.3 KB Created: 2021-05-10 22:00:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e954dd280f4db71ab5f91ab148888e11 SHA-1: 12dfb89022af5daef1558f428453d4b91fb77703 SHA-256: 1921d774784e899151f41f5148628792ed1c75bd5bd4de4fddf811dcea2fa31e
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and text explicitly advertising a 'Free Robux Generator' and a 'CLICK HERE TO ACCESS ROBLOX GENERATOR' call to action. These links redirect to a known malicious domain, indicating a phishing or scam attempt. The document's content and embedded links strongly suggest a lure to a fraudulent website.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-generator-no-human-verification-or-survey-2021-game-hack In 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_003_off00003507.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3507 24308 bytes
SHA-256: bcdb6e70b38dbd1784c3d7c937fd7ea303bb778f30a4dea7bc7896d025b49273
font_01_sfnt_off00006ca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA1 19556 bytes
SHA-256: 3a60cdb248c638d1e974f8488a9d0c49865e0dbecbd8cc682acbe36144e2e86e

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