Malicious PDF — malware analysis report

Static analysis result for SHA-256 7632bf4dde471def…

MALICIOUS

PDF

41.9 KB Created: 2021-05-18 05:45:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 0fb2fe2ca25471194591b021d8bd3733 SHA-1: c7c2f48b1a0f67203ac92e5b651579ee2dcdf983 SHA-256: 7632bf4dde471defe9f51031238f5b368c3677d3dde980c846ecc1dd6d8a0b1c
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains heuristics indicating it's a lure for a 'free generator / game hack' and links to known malicious redirector infrastructure. The document body, though partially garbled, mentions 'Microsoft Roblox Rewards' and includes the malicious URL. This suggests a phishing or scam attempt designed to entice users to click the provided link, which likely leads to malware or a fraudulent service.

Machine Learning

  • Nyx PDF Classifier clean score 0.0125

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/microsoft-roblox-rewards-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C2 31344 bytes
SHA-256: fb04f37731786d95e138cf779e96c1b478a14d24e3debd9c429fdb7da0c9edab
font_01_sfnt_off00007711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7711 2840 bytes
SHA-256: 787e0768241fb57660bcc9c7f726cf687277c463cdf8c586c4782ee9d03c3606
font_02_sfnt_off000080d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80D0 18772 bytes
SHA-256: 885cbd3f72e53b67117bb4048e91371d45fd893deaab7f6141eb78c54bb681fd

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