Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3ffc58ab50540e7…

MALICIOUS

PDF

46.7 KB Created: 2021-06-08 10:09:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6053b7f9ac2cab85ed3d417f52b315b1 SHA-1: 8ef95fd851b047a786b19245d97a0bdbb149ba77 SHA-256: b3ffc58ab50540e7c8421bdea0a25d87e24501b1b0df4a996a02acd9b09005a3
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to known malicious redirector infrastructure, which is designed to funnel users to potentially harmful websites. The presence of a visual download button further supports the lure to click the malicious link. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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 https://netcdn.tw/app/431946152/www.roblox-cheat.gdn-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-comroblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-roblox-exploits-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/pubg-uc-event_GM1330123889.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-bedrock-edition-pc-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spin-and-trading-group_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/www-coinmaster-com_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-roblox-wings_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/pubg-uc-vpn_GM1330123889.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-without-verification_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/pokemon-go-free-60fps_GM1094591345.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-spin-link-today_GM406889139.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_off000050d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50D7 28876 bytes
SHA-256: aa639688ea132919e7c2bd743798347f20da18c92f9697e7e894219b4b4e4867
font_01_sfnt_off0000910c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x910C 19172 bytes
SHA-256: 76bc52c513cc9dec77afb05c0eaa63c4c112412ca1627bbbfa994ad40314a1ef

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