Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff2eb69746024e67…

MALICIOUS

PDF

38.4 KB Created: 2021-05-10 16:07:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: ee1e1aea3ed95a6286b2905174f83e6e SHA-1: dce54da7b657a1119de84ece8bf0f5c713d899cb SHA-256: ff2eb69746024e67c74c6de746a8a8f2f8d32fe9f857036d5543b34e5dd3342f
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a redirector lure, specifically mentioning a 'free generator / game hack' for Roblox. The embedded URL, https://netcdn.xyz/app/431946152/roblox-free-play-game-hack, is identified as malicious infrastructure. The document body also contains text related to 'Roblox Free Play' and a call to action to access a generator, reinforcing the lure. Although no scripts were extracted, the PDF structure and the malicious URL strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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/roblox-free-play-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_003_off000033a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33A2 28340 bytes
SHA-256: e392f765999524a713f62a719fe55614a3546ee2a6652c31ecfe7145d7f2a51a
font_01_sfnt_off00007410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7410 18512 bytes
SHA-256: eed476aa069bc09357c43ec056cace655c39995f669be6a5bb4491b7d3b62334

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