Malicious PDF — malware analysis report

Static analysis result for SHA-256 e89da95e87f42715…

MALICIOUS

PDF

35.8 KB Created: 2021-05-24 09:32:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d04e752593cef2ae5de8341d2ccc4bd7 SHA-1: 3ff80474af3575a10f88c8123b501077fb292745 SHA-256: e89da95e87f427154553d9fbdc551b0cc078e1f8ba8a91dbb4637a83e04d66d9
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a redirector lure, specifically linking to a 'free generator / game hack'. The embedded URL, https://netcdn.xyz/app/431946152/get-free-robux-game-hack, is identified as a malicious redirector. The document body also contains explicit calls to action like 'Get Free Robux' and 'CLICK HERE TO ACCESS ROBLOX GENERATOR', reinforcing the lure. While no scripts were explicitly extracted, the PDF structure and the nature of the lure suggest it is designed to trick users into downloading a secondary payload.

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/get-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_off00002df4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2DF4 26184 bytes
SHA-256: d956ac2564371d17b4748bbf388273fe270d3b84218d748587552dd300c788c3
font_01_sfnt_off00006b3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B3C 18120 bytes
SHA-256: 79ac164380d838bf2943c127f808202d45f8751c05dbd036140e6fb9b1b49848

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