Malicious PDF — malware analysis report

Static analysis result for SHA-256 894dd8559990dfa9…

MALICIOUS

PDF

43.4 KB Created: 2021-05-16 22:16:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e401b72bd4ddd00bb9bb0b151a44d6a8 SHA-1: da65f790bcde36e2bb501875eb21beb91f056acb SHA-256: 894dd8559990dfa9acb2fab564107aa60694d9ebcc2a5ef89a6cf7f93aab0f0d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically advertising 'free Robux' and 'game hacks'. The document body, though partially obfuscated, also contains similar lures and URLs. This pattern suggests an attempt to trick users into visiting malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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/431946152/free-robux-not-a-scam-game-hack In PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-hack-spins-app_GM406889139.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-com-hack_GM431946152.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/free-coins-app-for-coin-master_GM406889139.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/is-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/free-minecraft-videos_GM479516143.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/i-want-free-robux_GM431946152.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/mcpe-master-free-coins_GM406889139.pdfIn PDF document text
    • https://phy.itk.ac.id/asset/backend/upload/ckeditor/files/minecraft-free-online-unblocked_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_off00004bed.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BED 25784 bytes
SHA-256: 0a3606417c25f85fc93be5c7c9a8a16ae998be9bda5462342665c5df79c618ab
font_01_sfnt_off00008642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8642 18608 bytes
SHA-256: 99f87fd07008d852f5f659b56544f95afedf5ace2cc64bf1a6de85fca727b1b9

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