Malicious PDF — malware analysis report

Static analysis result for SHA-256 d18677668879546c…

MALICIOUS

PDF

37.6 KB Created: 2021-05-13 06:31:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: dc1547b50da5bd43c162ca14b1161d45 SHA-1: 2f33c29c7bbd17a1719d23664adcaf1d5a7ca306 SHA-256: d18677668879546c396f063ee43146111bf16ff2aa3ffceee846fd343780a267
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains heuristics indicating it is a lure for a "free generator / game hack" and links to known malicious redirector infrastructure. The embedded URL, https://netcdn.xyz/app/431946152/how-to-get-free-robux-on-roblox-game-hack, is the primary indicator of malicious intent. Although no scripts were explicitly extracted, the nature of the lure suggests a potential for further malicious activity, such as downloading a second-stage payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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-on-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
font_00_sfnt_off0000337c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x337C 27324 bytes
SHA-256: 12fa2dfd0852f7b695595b368e25fcd61c25e5772e713eef79f331b028f7e223
font_01_sfnt_off0000717a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x717A 18356 bytes
SHA-256: 07f7f5fe088ebb6a81b9aca0d3b7acb37488304f642f9e675d153fcc87cea6c5

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