Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b282a1596bbc383…

MALICIOUS

PDF

28.1 KB Created: 2021-06-30 22:38:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 984083a0b7bfacbec0511d04985633fc SHA-1: aceec34cd5f9ce3e25b4130d219ed6a82fe015ec SHA-256: 0b282a1596bbc3833d578274484f5df3577c1b13adb8ab093afcc082895dc424
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic indicating it links to a malicious redirector disguised as a 'free generator / game hack'. The document body also contains text and a URL pointing to 'hacks-for-roblox-flying-game-hack', reinforcing the lure. While no scripts were extracted, the presence of a malicious redirector suggests an attempt to lead the user to a site that likely hosts further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier clean score 0.0330

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 http://netcdn.co/app/431946152/hacks-for-roblox-flying-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_off00001710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1710 22776 bytes
SHA-256: 032613b5411ca94977eb0262fa1bdcf70a11ec14db6e667e3435ac5eca3aa7d3
font_01_sfnt_off00004a1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A1C 19120 bytes
SHA-256: 872a3754081e215f7cf90d50d3433a1bae6d7df6b45f685dfa126aa6e02f6054

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