Malicious PDF — malware analysis report

Static analysis result for SHA-256 a989740f4db71248…

MALICIOUS

PDF

38.0 KB Created: 2021-05-10 12:03:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4e6506c63df9d2de8822eea7e0815c55 SHA-1: 80b87d97d992e6af8ec09320ae634eecdb811c5c SHA-256: a989740f4db71248473123b31d45e58919a613f660e9f794315d0a4cca967ff9
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'free generator / game hack' which redirects to a known malicious URL. This indicates a phishing or scam attempt designed to trick users into visiting malicious sites. The embedded URL is the primary indicator of malicious intent.

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/how-to-get-free-robux-without-doing-anything-2021-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_off0000344f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x344F 24504 bytes
SHA-256: 831b481b3c2d200605195a6a4ebb8b34f842e4b69ff8180eacdaa2829e781d5a
font_01_sfnt_off00006c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C50 20560 bytes
SHA-256: e2cfebc83dc1d7b89fe661b3a05b182e32120ac9ff53cec7e552120925556f1a