Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb68f90191d7c1dc…

MALICIOUS

PDF

36.0 KB Created: 2021-05-13 01:47:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7af6de04fac139bfe4af80c1885877b1 SHA-1: c5cc324e19671b93bcad9e97753f7cc7accd456f SHA-256: eb68f90191d7c1dcbac09232a10eb676bd475a9e5f276cb40ca7c35af2579408
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a redirector link, specifically pointing to a lure for a 'free generator / game hack'. The embedded URL, https://netcdn.xyz/app/431946152/free-headless-head-roblox-game-hack, is identified as malicious infrastructure. The document body also contains similar text and a call to action, reinforcing the phishing attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0265

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-headless-head-roblox-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_off000031e6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31E6 24800 bytes
SHA-256: 75c7049981618836923436e3a8844e5298040f59f2f95d19eb8d3773f8d4a893
font_01_sfnt_off00006aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AED 18348 bytes
SHA-256: 63d99b8cbf455ab0d965626ac401ea421cc47a85f69736e4fa719bce4e2c55ac