Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c8fec765503be53…

MALICIOUS

PDF

33.0 KB Created: 2021-07-19 02:14:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 31b4793663fba23231cea04633013181 SHA-1: 5fb629e8f25dcdc08cdd62fe10a78aa7072df679 SHA-256: 6c8fec765503be53256caffa6fcffddba59db1f8dbc7bd50bff97a30c4df5f1b
160 Risk Score

Malware Insights

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

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free Robux' and game hacks. The ML classifier also flagged this PDF as malicious. The embedded links likely serve as a lure to download further malicious content or lead to exploit delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9548

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 http://netcdn.tw/app/431946152/free-robux-offers-game-hack In PDF document text
    • http://artindex.pro/images/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://artindex.pro/images/minecraft-font-free_GM479516143.pdfIn PDF document text
    • http://artindex.pro/images/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://artindex.pro/images/how-to-get-verified-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://artindex.pro/images/minecraft-windows-10-edition-free_GM479516143.pdfIn PDF document text
    • http://artindex.pro/images/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://artindex.pro/images/how-to-get-free-robux-without-paying_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_off00002c14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C14 22972 bytes
SHA-256: 90894c0563b1c0f90529dd5c5ec3d921a665de0fba6f061e07a77d65349311c1
font_01_sfnt_off00005f6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6C 18200 bytes
SHA-256: e0a7c020d8fb886e6e6af22e59e327724b1d58f4fe63ad13f7dbfe7506eb50a9

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