Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f242555c83e2fcc…

MALICIOUS

PDF

24.6 KB Created: 2021-05-12 16:03:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 39525f165e0b6b987416b89f9bb7e4d5 SHA-1: 51e19fe5b962e8d3676162c8d45cafdcf7b5bbfd SHA-256: 8f242555c83e2fcc35334b68b8ab2489ac76aa647b2fabf1f69f32f9aff7ba2b
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, masquerading as a 'free generator / game hack' for Roblox. The document body explicitly contains the malicious URL and a call to action to access the generator. This indicates a phishing or scam attempt designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier clean score 0.0358

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/what-is-robux-in-roblox-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
font_00_sfnt_off00000f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64 22032 bytes
SHA-256: 9749e77934ff7b389438313ef5cce1be28314967fdbba47f82c37143ba14b9bb
font_01_sfnt_off00003f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F85 17924 bytes
SHA-256: ddfb0312d588ec03ac65213a097ce9a5037b43614a8d9995e14301d30f0b88c0

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