Malicious PDF — malware analysis report

Static analysis result for SHA-256 05d1c2985f1d480e…

MALICIOUS

PDF

35.7 KB Created: 2021-05-10 11:47:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f12de3346cc4f2ccdde908410098544a SHA-1: da9211ed6ff74e1b301ec1570bb00c4d24e6a0a1 SHA-256: 05d1c2985f1d480e804b914e197fc2323abe945db0d998ffd628b5345aabb387
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to a 'free generator / game hack' lure. The document body and embedded artifacts further reinforce this, with the URL https://netcdn.xyz/app/431946152/free-exploits-for-roblox-game-hack being present and identified as a malicious redirector. The presence of a download button lure, though low-signal on its own, supports the overall malicious workflow.

Machine Learning

  • Nyx PDF Classifier clean score 0.0282

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-exploits-for-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_off000031a0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31A0 24576 bytes
SHA-256: c6f798283d7e0f1b79c9f34153f09148b1d04bc71027fd91912ffa92f649ed9e
font_01_sfnt_off000069be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69BE 18348 bytes
SHA-256: 3eb1125b3232d06dc8927376afe50af41f8c0a9e23720a9da0c3984e77695e12

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