Malicious PDF — malware analysis report

Static analysis result for SHA-256 53d9098cfd40205e…

MALICIOUS

PDF

36.3 KB Created: 2021-05-25 07:32:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 9d7602057b896fb3c99a7be730026eb9 SHA-1: e024947a006f2baad3b1c985fa381991fd35ed41 SHA-256: 53d9098cfd40205e303474360cfa8aed1ded410dffcf07494d39435f31abfa45
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for 'free Robux' and a prominent 'CLICK HERE TO ACCESS ROBLOX GENERATOR' call to action, directly linking to a known malicious redirector. This indicates a phishing or scam attempt designed to lead users to potentially harmful content or further malicious sites. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

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/games-that-give-you-free-robux-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_002_off00002f8e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F8E 25372 bytes
SHA-256: 2704d91e775b5abec60a372072828e70450e117e3a6dfd1d342b42072418d702
font_01_sfnt_off00006a81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A81 19168 bytes
SHA-256: c4d6735542cd49b50f18b2921f89e54fe5d8ee4af3f47c61005942af246faebd

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