Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7f432c4340f2600…

MALICIOUS

PDF

31.6 KB Created: 2021-06-03 11:28:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b69e1b478e21f935ab2a1e2ba2ec8226 SHA-1: 66f70e5a4fcba9071ee8c3d16a512230c8d48bed SHA-256: a7f432c4340f2600af7949db8895f46373d4adf578d2c5dd8ba6f45cdab3e784
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically a lure for a 'free generator / game hack'. The document body, though heavily obfuscated, contains text related to Roblox and free generators, reinforcing the lure. No scripts were extracted, but the primary malicious action observed is the redirection to a malicious URL.

Machine Learning

  • Nyx PDF Classifier clean score 0.0621

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.online/app/431946152/can-i-get-robux-for-free-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_off0000221f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x221F 24812 bytes
SHA-256: 695d2bd95b2da2e0c3f8d437508195dfbbe98a973374bcdcedfb6c95feb56e17
font_01_sfnt_off00005bd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD7 17740 bytes
SHA-256: e9ea94ab0109f307118c8bc9d11133eadf8635af2b0da264cc1ed3031df6dcca