Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d468994ed04fcdc…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 18:11:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f8271dc84e1c2e90c4503241582ffa29 SHA-1: c873481caaa6fcb49f2cc2fb8cf35e7efedbfbde SHA-256: 3d468994ed04fcdcdfafe8dd3c70c907948aee328f1b9d9027538937f9afc603
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on "free Robux" or "game hack" generators. These links redirect to malicious infrastructure, specifically http://netcdn.tw/app/431946152/free-robux-no-offers-game-hack, which is flagged as a known malicious redirector. The document body and embedded URLs strongly suggest a social engineering tactic to trick users into visiting potentially harmful sites, likely for further malware delivery or credential harvesting.

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.tw/app/431946152/free-robux-no-offers-game-hack In PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-free-medieval-hood_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/robux-free-page_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-free-liberty-county-gamepass_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/fre-robux-fro-reallllllll_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/robux-2021-free_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-promo-codes-august-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-robux-hack-tool-generator_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-hack-scripts-2021-powerplay_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/level-hack-roblox-naruto-final-bond-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/krnl-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/robuxian-free-robux-hacks_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/mathep_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-hack-2021-no-survey_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-super-hacks-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/getbucks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/hack-coin-master-android_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/.IIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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_off00003327.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3327 22568 bytes
SHA-256: 79fec3f081ddd01be5971173b73fc57876340993529ae3681f2885f602990cde
font_01_sfnt_off00006573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6573 18716 bytes
SHA-256: 6cef72b87605a464df8901898d024a902d738decefc8e487a7362df6534fb924

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