Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f53664ef6f3a0f3…

MALICIOUS

PDF

49.0 KB Created: 2021-06-09 07:26:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 14a3e7645243a3501aae2a9f51f443a8 SHA-1: bc82ed603e32f41daf3e95550e34a6743be64d82 SHA-256: 4f53664ef6f3a0f35908c4551d9c5df812186185df52e1a29150adc667693fc0
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links that redirect to websites offering game cheats and hacks, such as free Robux for Roblox. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms these links point to known malicious infrastructure. The document body, though partially corrupted, contains text related to these lures and a URL that is also listed as an IOC.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/roblox-how-to-get-free-robux-with-cheat-engine-6.2-game-hack In PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/hack-coin-master-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/pokemon-go-free-legendary-pokemon_GM1094591345.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/wurst_GM479516143.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/games-on-roblox-that-have-free-boombox_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.stomatoloska-ordinacija-rijeka.com/files/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/coin-master-70-spin-link-today_GM406889139.pdfIn PDF document text
    • http://stomatoloska-ordinacija-rijeka.com/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5161 24600 bytes
SHA-256: ab1c3a84d3ae527b01a0e261ccae20a01aeb366dd60265c9b9969013b793a6fe
font_01_sfnt_off000089a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89A2 6264 bytes
SHA-256: 5256459668661e967a95580b9a0b8b4774369b7473f63845cd6cc12ba622a1dd
font_02_sfnt_off000098b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98B9 19716 bytes
SHA-256: ecef2ac2eb1fdd611461f2bd264b77328e583bd496c1e6bba9391f6a75b56c17