Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a0b288733f1d4aa…

MALICIOUS

PDF

48.1 KB Created: 2021-06-03 09:22:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f512825911b55969e5faf11fae2a1f12 SHA-1: a33185cc19cf434ca15063ba5293e0cea1c355a2 SHA-256: 4a0b288733f1d4aadc4902c0d79359a6e4d33b63b9f0a01cbd8a80abe5dfd6d7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising a 'free generator / game hack'. The primary lure URL is https://netcdn.online/app/406889139/hack-coin-pro-coin-master-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector designed to lure users into clicking on potentially harmful links, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/406889139/hack-coin-pro-coin-master-game-hack In PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/minecraft-wurst-client_GM479516143.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/info-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/coin-master-bonus_GM406889139.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/coin-master-daily-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/how-to-make-a-minecraft-bedrock-server-for-free_GM479516143.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/free-spins-coin-master-2021-glitch_GM406889139.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/earn-robux_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/free-roblox-gfx_GM431946152.pdfIn PDF document text
    • http://hpen.gmcc-welling.com/Public/upload/editorfiles/free-robux-generator-without-verification_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_off00005294.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5294 26036 bytes
SHA-256: 2b5a549ade677654cbbe868713fb08ad3e4073043ff2f2c5512813606339f2f8
font_01_sfnt_off00008df1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DF1 3604 bytes
SHA-256: ead41f9d39711eba667feb01c27f0b7e82919726a9aa2ca181059bfe98c66c01
font_02_sfnt_off00009aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AA2 17868 bytes
SHA-256: 8414f5d689964aeb56a8bb0109c3531c9ea2311b4dd6f38a0b43982a4f3b1952

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