Malicious PDF — malware analysis report

Static analysis result for SHA-256 8125042573596be2…

MALICIOUS

PDF

35.5 KB Created: 2021-06-23 10:05:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 310be90f3882515d2ee51d8989780431 SHA-1: 9eaaedda72c3f2b56c3e9547d6cf48b36c0d79d9 SHA-256: 8125042573596be26d61a5c7f6211f7e06354f7ccc60ec2e661e9fcc5d828ec6
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links and document body text promoting 'free Robux' and game hacks, directly linking to malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the malicious nature of the target URL. The presence of a visual download button lure further supports the deceptive nature of the document.

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/robloxhero.xyz-free-robux-game-hack In PDF document text
    • http://lib.untad.ac.id//repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-hack-mod-game-download_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/fart-attack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/dailyrobux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/synapse-roblox-free-no-virus_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-easy-verification_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-and-limiteds-generator_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/strucid-aimbot_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_off0000322a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x322A 22628 bytes
SHA-256: 391d911ff6e4f032c98f18804e5b08eeb837fa713c69cf0be3074f329b3af31c
font_01_sfnt_off00006502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6502 19284 bytes
SHA-256: d9c012e6360cbb9922075e5cd0ba117dac630e88a21f58616bfd93191494c507

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