Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf9347812bd776d3…

MALICIOUS

PDF

46.9 KB Created: 2021-06-11 09:54:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3169cc30542010bd0df2fb34d500cd6c SHA-1: 708417e394d1425eadc1417a67b12609079d3973 SHA-256: bf9347812bd776d39895583feb813c6fc9866d21a2f0a160aa638e8a6b3d9bd8
102 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are SEO-optimized and point to other PDFs, forming a link farm. The document body and extracted URLs suggest a lure for free Robux or game hacks, indicating a phishing or scam attempt. The presence of a download button heuristic further supports the malicious intent of directing users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/how-to-hack-free-robux-2021-game-hack
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/minecraft-toolbox-premium-apk_GM479516143.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/hack-de-roblox-adopt-me_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/free-robux-no-verification-no-survey_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/cheat-codes-for-tower-battle-simulater-in-roblox_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/get-minecraft-windows-10-free_GM479516143.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/free-robux-no-installing-games_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/how-to-get-free-tiktok-fans_GM835599320.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/free-100-robux_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/cheat-ninja-legends-roblox_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/how-to-buy-pubg-uc-in-india_GM1330123889.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/how-to-get-free-shirts-on-roblox_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/coin-master-facebook-page_GM406889139.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/install-free-game-coin-master_GM406889139.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/roblox-rocitizens-money-hack-2021_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/free-roblox-website_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/can-you-make-a-minecraft-server-for-free_GM479516143.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/pubg-uc-satn-al_GM1330123889.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/coin-master-tricks-and-hacks_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053dc.bin
b04b9eb0b489c0ebf849e3de0d3cdbc7c6b5f1cfdb1e4676e2f2a457e96f80e5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53DC 26984 bytes
font_01_sfnt_off000092da.bin
c853360e489ac826e2c3d4f31df8e9f029b534dbfbac8c5f841885e192cc1b5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92DA 18976 bytes

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