Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9bb51d02154758c…

MALICIOUS

PDF

34.9 KB Created: 2021-06-28 02:19:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c8b27945015fa6571abb758901fec3b6 SHA-1: d4920448e80a9d2c4224926c94d4e052b7b0e437 SHA-256: b9bb51d02154758cd73622ae734495d62b13934f4dc3de5c910822a21079a0d8
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links and text that promote free in-game currency and hacks for popular games, directly linking to a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The presence of these lures suggests a phishing or social engineering attack aimed at tricking users into visiting malicious sites or downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 3

  • 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/roblox.com-robluks-for-free-game-hack In PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spin-whatsapp-group-link_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/packet-of-world-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-hack-roblox-to-get-emitted-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-my-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spins-uk_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-headphones-free_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/btools-roblox-hack-download-free_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/creepy-hacker-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-cute-outfits-on-royale-high-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-bc-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/good-roblox-hacker-names_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-animation-hack-on-roblox_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_off00003265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3265 21916 bytes
SHA-256: 4f48200732f6b9be2f147108234a6cda1bdab8038eb6dab9101eff0eeb6adc3e
font_01_sfnt_off000062ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62AB 19288 bytes
SHA-256: 1a807eca88de8a63e9d6d0f3e2a72141220bb899a8dda55a832d49c6167cd431

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