Malicious PDF — malware analysis report

Static analysis result for SHA-256 0847a1a7b6e53894…

MALICIOUS

PDF

35.3 KB Created: 2021-06-20 03:15:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0ccfd36aa6238452494764604af2313d SHA-1: 1c9c386bbec3c79168e4cb9c79416867923e778d SHA-256: 0847a1a7b6e53894867b066c0d055b9eddd468ccd0bd335c572bb38069e21c5c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector infrastructure, specifically advertising 'game hacks' and 'free generators'. The ML classifier strongly indicated maliciousness, and the heuristic firings confirm the use of a malicious redirector and a lure for game-related cheats. No scripts were extracted, but the document's structure and embedded URLs suggest it is designed to lead the user to a site that likely hosts further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/2021202168-roblox-code-hack-game-hack In PDF document text
    • https://www.indo-parabola.com/ckfinder/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://indo-parabola.com/ckfinder/userfiles/files/get-fre-robux-just-by-join-this-group_GM431946152.pdfIn PDF document text
    • https://indo-parabola.com/ckfinder/userfiles/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://www.indo-parabola.com/ckfinder/userfiles/files/get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • https://indo-parabola.com/ckfinder/userfiles/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://indo-parabola.com/ckfinder/userfiles/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://www.indo-parabola.com/ckfinder/userfiles/files/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://www.indo-parabola.com/ckfinder/userfiles/files/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • https://indo-parabola.com/ckfinder/userfiles/files/how-to-get-stuff-that-cost-coins-free-mcpe-master_GM406889139.pdfIn PDF document text
    • https://www.indo-parabola.com/ckfinder/userfiles/files/roblox-knife-script-hack_GM431946152.pdfIn PDF document text
    • https://www.indo-parabola.com/ckfinder/userfiles/files/free-robux-giveaway-every-hour_GM431946152.pdfIn PDF document text
    • https://www.indo-parabola.com/ckfinder/userfiles/files/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • https://www.indo-parabola.com/ckfinder/userfiles/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • https://indo-parabola.com/ckfinder/userfiles/files/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • https://indo-parabola.com/ckfinder/userfiles/files/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.indo-parabola.com/ckfinder/userfiles/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • https://www.indo-parabola.com/ckfinder/userfiles/files/how-to-hack-coin-master-spin-ios_GM406889139.pdfIn PDF document text
    • https://www.indo-parabola.com/ckfinder/userfiles/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://indo-parabola.com/ckfinder/userfiles/files/free-robux-app_GM431946152.pdfIn PDF document text
    • https://indo-parabola.com/ckfinder/userfiles/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3160 22332 bytes
SHA-256: bfed6e6bc3e9d55327c5891cf00df02ad8e1d1f7ca000abeeac16433f599c1d5
font_01_sfnt_off000062ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62EC 19612 bytes
SHA-256: e26330196c808542359e82bee4f649d10f13987890d37b4b161b3e0d86ecf0f5

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