Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aae7b8bd28d111c…

MALICIOUS

PDF

26.1 KB Created: 2021-05-22 03:07:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 70ff6788d2dbe01f70001f682e5c8823 SHA-1: 6c4a6885bb49e48566ade3ddf32fa43d6a28c1f8 SHA-256: 9aae7b8bd28d111c13d4bd9810f33f752df7548475aa940ddc9e43cf28dba023
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malicious link disguised as a lure for game hacks and generators, which is a common social engineering tactic. The embedded URL points to known malicious redirector infrastructure. While no scripts were extracted, the PDF structure and heuristics indicate a workflow designed to trick the user into navigating to a malicious site, likely to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0372

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/rbxfree-com-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
font_00_sfnt_off000014bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BB 22512 bytes
SHA-256: 7ff47590a7357279abff3009785c8dcfb3ae37bae4707a8ff1606f57db393315
font_01_sfnt_off000046a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46A9 17668 bytes
SHA-256: a59b78b036232e52793665f722747f1140b39b0b8afb2a62722737cd24ed10c1

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