Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a2d6b2aa119fd9…

MALICIOUS

PDF

35.6 KB Created: 2021-05-20 18:14:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1d8f1d253654655f294eab00313a78b2 SHA-1: b34f558ca9fc5b0983b2728b73b6bcf06aa3c2c4 SHA-256: e3a2d6b2aa119fd9405e388b8425714faab6d06fe8cf5d63590f4e3e52e54cc3
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a game hack redirect lure, pointing to a malicious URL. Another heuristic indicates a general malicious redirector link. The document body, though partially corrupted, contains text related to 'Roblox Land Free Robux' and a 'CLICK HERE TO ACCESS ROBLOX GENERATOR' call to action, reinforcing the lure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

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/roblox-land-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_off00002fc6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FC6 25272 bytes
SHA-256: 4af9e348702023fa4a2d19f73f36e0fd23f64df45d3ccbc4f9b3a6f8ecd3cd06
font_01_sfnt_off00006958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6958 18492 bytes
SHA-256: dd1922fe1cc281356c7e312f91778e191ebdc244bf13f8823862483f595251c7

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