Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e5b193ebcdd3b02…

MALICIOUS

PDF

46.6 KB Created: 2021-06-07 01:44:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: aac6956e758db54f4ccde728a2d3e838 SHA-1: b197f1080917f4e638c0f0fee0f544c87d5c0c20 SHA-256: 8e5b193ebcdd3b028afb72a8218905d45627bdbfa20be7b8855e02b39ed4d57d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to known malicious redirectors, specifically promoting 'free generator' and 'game hack' lures. The document body, though heavily obfuscated, contains references to these lures and the authoring application 'wkhtmltopdf', suggesting it was generated programmatically. The primary function appears to be redirecting users to malicious sites that likely host further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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.tw/app/431946152/easy-robux-hack-com-game-hack In PDF document text
    • https://kinderdam.nl/images/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/roblox-free-accessories-2021_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • https://kinderdam.nl/images/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • https://kinderdam.nl/images/how-to-get-free-roblox-items_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/wurst-minecraft_GM479516143.pdfIn PDF document text
    • https://kinderdam.nl/images/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • https://kinderdam.nl/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://kinderdam.nl/images/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • https://kinderdam.nl/images/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • https://kinderdam.nl/images/optifine-pe_GM479516143.pdfIn PDF document text
    • https://kinderdam.nl/images/how-many-levels-are-in-coin-master_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://kinderdam.nl/images/free-roblox-executor_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
stream_004_off00004e4c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E4C 24896 bytes
SHA-256: 55dc4b4ebfe2bff45acc4efe6f98127438d7e3a9d2663c2c46b8a651c0e63d7b
font_01_sfnt_off00008800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8800 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000091ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91EA 18688 bytes
SHA-256: 4e221fdbc73c3eb556a0a14bab085913370eeafd35013f1477fb855619537988

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