Malicious PDF — malware analysis report

Static analysis result for SHA-256 22378a53436f6f45…

MALICIOUS

PDF

38.0 KB Created: 2021-05-15 16:31:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 44adbed34744e0ae3d611c564724ab28 SHA-1: 9f2675b366f667b344c729454a7980f9d1544656 SHA-256: 22378a53436f6f45ba5bc2d631b3e1513c1390775662de6c9181389d87ae94f6
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it's a lure for a 'free generator / game hack', specifically linking to a URL associated with malicious redirector infrastructure. The document body text reinforces this by displaying 'Free Robux Hack No Verification' and a call to action to access a Roblox generator. While no scripts were extracted, the embedded URLs and the nature of the lure strongly suggest an attempt to redirect users to a malicious site for further exploitation.

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/free-robux-hack-no-verification-game-hack In PDF document text
    • https://discordIn 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_off0000381a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x381A 25108 bytes
SHA-256: 6d240b73b77e52919768a3fb39917222778042987e1e2695da17fd2f94eab406
font_01_sfnt_off000071e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71E5 18772 bytes
SHA-256: 87cd01898e0c435f6b8e3fdf3db31fb3453f40f32176463e71dafc861d9bd3f7

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