Malicious PDF — malware analysis report

Static analysis result for SHA-256 36b654e1950b83ed…

MALICIOUS

PDF

44.1 KB Created: 2021-06-09 03:42:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0dac4a6ef58d3476a2564e163fcd8958 SHA-1: ec1892a414b9a375f2fc3e4c8b138452b994eade SHA-256: 36b654e1950b83ededd281afee1894184be73710049108c3c66e1cde4637c3f9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a link farm, strongly suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains references to 'free Robux' and 'game hack', aligning with the heuristic findings of a lure for virtual currency. The presence of external URIs indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/free-robux-for-no-money-game-hack
    • http://stikgiamakassar.ac.id/digilib/repository/free-robux-real-2021_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-free-coins-facebook_GM406889139.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/how-to-hack-robux-2021-on-ipad_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/hack-coin-master-for-android_GM406889139.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/how-to-get-free-tiktok-coins_GM835599320.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/minecraft-mac-free_GM479516143.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/roblox-jailbreak-hack_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/dragon-ball-rage-cheats-roblox_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/spin-hack-for-coin-master_GM406889139.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/how-many-levels-in-coin-master_GM406889139.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/free-robux-project-gamesnet_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-free-spins-app_GM406889139.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/how-to-get-free-roebucks_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/roblox-www-com_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-hack-tool-v1-9-apk_GM406889139.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/how-do-you-get-free-robux-without-paying_GM431946152.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdf
    • http://stikgiamakassar.ac.id/digilib/repository/bloxpage-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000501d.bin
e8db371031eb0882eefee2dfaa9c09768b8e57962ecb4037f201fab0c465a014		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x501D 24748 bytes
font_01_sfnt_off0000895a.bin
d8e1ea7979898472c7791fd083d8b04d0a89d99a5ca3b548634428829664aafb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x895A 18388 bytes

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