Malicious PDF — malware analysis report

Static analysis result for SHA-256 52624658549002c0…

MALICIOUS

PDF

27.0 KB Created: 2021-06-30 05:13:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 8b74180eabc387fdc4fa1d701e0f9956 SHA-1: 4924858cd9309383bd58c00ad54853fccc02e7e3 SHA-256: 52624658549002c0eceff0526821cc9f20970bcb410736d8eec48163cec4b9aa
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains embedded links that redirect to a known malicious domain, masquerading as a game hack or generator. The document body explicitly mentions 'Free Roblox Accounts With Robux' and a 'ROBUX GENERATOR', indicating a phishing or scam lure. The presence of embedded links and the nature of the lure strongly suggest an attempt to trick users into visiting malicious sites, likely for credential harvesting or further malware delivery.

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 http://netcdn.co/app/431946152/free-roblox-accounts-with-robux-that-work-not-banned-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_off0000169f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169F 20824 bytes
SHA-256: 2f4b8cbbc58245546830d053b513d507104bf9a6b185259856a9e1dbe4e6eb25
font_01_sfnt_off000043ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43FF 19720 bytes
SHA-256: e7aa0a474f873a6e751f5083720d35e515444fa97241f03d9058db0775c81672

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