Malicious PDF — malware analysis report

Static analysis result for SHA-256 87676ab03a5f1e20…

MALICIOUS

PDF

34.8 KB Created: 2021-06-30 07:26:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 60fad72a1c375de738ff29c3874ab50d SHA-1: d7b823384d7a82c1e0f67185e7adbd3acee68763 SHA-256: 87676ab03a5f1e2059cf69728d4d32c179d70f06b34bd14f0d70159911c26382
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free Robux' and 'game hacks' to lure victims. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs confirms a redirection attempt. The document's purpose is to drive traffic to malicious sites, likely for further exploitation or phishing.

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/431946152/20210-robux-free-game-hack In PDF document text
    • http://library.itekes-bali.ac.id/repository/minecraft-noob-vs-pro-vs-hacker_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-cheat-gg_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-outfits-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-free-robux-robux-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-free-robux-november-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/mcpe-master-hack-unlimited-coins-apk_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/master-free-spin_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/robux-online_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-cheat-table-mm2_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-with-inspect-element_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/the-quarry-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/minecraft-free-edition_GM479516143.pdfIn 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
stream_002_off00002ef0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EF0 22888 bytes
SHA-256: 2476e597134a3730b9a3badc71979eef9c8716365482139b23c35e67c54411c0
font_01_sfnt_off00006295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6295 19116 bytes
SHA-256: 46b6d0275138487d24ca16497f636915a6275a54ce4394516224517765e536f7

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