Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c42d3593113cad2…

MALICIOUS

PDF

39.2 KB Created: 2021-05-13 00:02:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 36a7fd6cba2817c8210a6fabe8563177 SHA-1: c66a50206d6c49dfec843d91196e65b477e396d2 SHA-256: 6c42d3593113cad2801ddb40a364176b56a503f84518af471098632b8d29ca59
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links and a call-to-action phrase designed to trick users into visiting a malicious URL. The primary link, 'https://netcdn.xyz/app/431946152/free-robux-gift-card-game-hack', is flagged as a known malicious redirector. The document body and heuristics indicate a lure for a "free generator / game hack" to facilitate phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9280

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-gift-card-game-hack In PDF document text
    • http://businessfit.com/images/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://businessfit.com/images/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://businessfit.com/images/roblox-gift-card-for-free_GM431946152.pdfIn 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_off000035fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35FD 28200 bytes
SHA-256: 2d304fff754a6901eb25e86e66dbfc821aea3cc0815cf395c07b3229265cf457
font_01_sfnt_off000076ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76AB 18640 bytes
SHA-256: 59f1432744b9d8cf879cb7c8a299bbbbba85d5427cd565107f85277265ec050e

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