Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6aef2f2fdabdcf2…

MALICIOUS

PDF

41.6 KB Created: 2021-05-14 18:31:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 662efab6af189967646aee93a382c168 SHA-1: 41f7de025119676b96233eebfc8bc77497b4739d SHA-256: b6aef2f2fdabdcf2e679f2f287b3312299aed58fbbf7603877d3d83ed47e9e0f
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirector lure, pointing to a malicious URL. The document body, though partially garbled, includes text related to 'Free Robux Easy Hack' and the malicious URL. The presence of embedded URLs and the nature of the lure suggest a phishing or scam attempt designed to trick users into visiting a potentially harmful website.

Machine Learning

  • Nyx PDF Classifier clean score 0.0125

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-easy-hack-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000344d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x344D 28992 bytes
SHA-256: 724433a0ca48749213128032f178ee4a7ca61d0f6986c79fb6349eec9e5480e3
font_01_sfnt_off00007571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7571 2888 bytes
SHA-256: 5956e24463486e518537f1b2ad9d990ba0383cc510a4ff3b6f5a1d506a321400
font_02_sfnt_off00007f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F6B 18860 bytes
SHA-256: ae4481784f2b59baf7f887bcc8933de4398304efe668e0a39e1c63b4066a7356

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