Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d661ff3a37f5056…

MALICIOUS

PDF

41.6 KB Created: 2021-05-14 21:06:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d7e34210aaa19766f6ed877a645b4a6b SHA-1: 540d400098113d64a54bbe391e761c45d57ce486 SHA-256: 5d661ff3a37f5056fe9610b743dad692c4ba6d628655fcfda119f2146f2855f1
100 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that point to known malicious redirector infrastructure, specifically targeting users interested in game hacks and cheats. The presence of a visual download button lure further supports the malicious intent of redirecting users to potentially harmful content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-hack-3.5.5-game-hack In PDF document text
    • https://naturenz.vn/public/files/roblox-avatar-girl_GM431946152.pdfIn PDF document text
    • https://naturenz.vn/public/files/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • https://naturenz.vn/public/files/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://naturenz.vn/public/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://naturenz.vn/public/files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • https://naturenz.vn/public/files/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • https://naturenz.vn/public/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://naturenz.vn/public/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://naturenz.vn/public/files/coin-master-game-free-download_GM406889139.pdfIn PDF document text
    • https://naturenz.vn/public/files/games-for-robux_GM431946152.pdfIn PDF document text
    • https://naturenz.vn/public/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://naturenz.vn/public/files/robux-only_GM431946152.pdfIn PDF document text
    • https://naturenz.vn/public/files/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
    • https://naturenz.vn/public/files/8bp-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://naturenz.vn/public/files/coin-master-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://naturenz.vn/public/files/get-more-robux_GM431946152.pdfIn PDF document text
    • https://naturenz.vn/public/files/coin-master-play-online-free_GM406889139.pdfIn PDF document text
    • https://naturenz.vn/public/files/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://naturenz.vn/public/files/get-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://naturenz.vn/public/files/free-minecraft-generator_GM479516143.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
stream_003_off000047b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47B9 24852 bytes
SHA-256: d2e81a5e7e8dffac41bf97e0aafeb2dd27926734564065938a6dd06d8fc8587a
font_01_sfnt_off000080c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80C7 18088 bytes
SHA-256: 13ec477abf113127a618fa5d81506a62133832003edcea60c7bf1f0e56d0719f