Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a9d8f40cfbbf72e…

MALICIOUS

PDF

45.6 KB Created: 2021-06-08 22:04:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 70dd397cbb568883657e9453d12e91f2 SHA-1: 78a1cb6d6dc5b11be561c55c2fdb9c7596f4f489 SHA-256: 2a9d8f40cfbbf72e130445f20cfa2488330547a4e63949b55cc671f6c2e59411
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links and a document body that mimics a download page for game-related items, suggesting a lure to trick users into downloading malicious content. The presence of a PDF URI heuristic and a high ML classifier score indicates malicious intent. While no scripts were explicitly extracted, the structure and embedded links point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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-download-a-swear-free-roblox-speech-pluggin-game-hack
    • http://digilib.stiki.ac.id/repository/easy-way-to-get-robux_GM431946152.pdf
    • http://digilib.stiki.ac.id/repository/free-rare-cards-for-coin-master_GM406889139.pdf
    • http://digilib.stiki.ac.id/repository/roblox-online-free-no-download_GM431946152.pdf
    • http://digilib.stiki.ac.id/repository/minecraft-realms-free_GM479516143.pdf
    • http://digilib.stiki.ac.id/repository/free-roblox-hacker-no-human-verification_GM431946152.pdf
    • http://digilib.stiki.ac.id/repository/free-draw-2-roblox_GM431946152.pdf
    • http://digilib.stiki.ac.id/repository/coin-master-coins-free_GM406889139.pdf
    • http://digilib.stiki.ac.id/repository/free-coins-coin-master-iphone_GM406889139.pdf
    • http://digilib.stiki.ac.id/repository/how-to-get-free-minecraft-coins_GM479516143.pdf
    • http://digilib.stiki.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://digilib.stiki.ac.id/repository/coin-master-hack-without-verification-code_GM406889139.pdf
    • http://digilib.stiki.ac.id/repository/minecraft-hacks-pc_GM479516143.pdf
    • http://digilib.stiki.ac.id/repository/free-minecraft-skins-pc_GM479516143.pdf
    • http://digilib.stiki.ac.id/repository/robuxy-com-free-robux_GM431946152.pdf
    • http://digilib.stiki.ac.id/repository/coin-master-free-spins-hack-2021_GM406889139.pdf
    • http://digilib.stiki.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdf
    • http://digilib.stiki.ac.id/repository/what-is-robux-in-roblox_GM431946152.pdf
    • http://digilib.stiki.ac.id/repository/coinmaster-com_GM406889139.pdf
    • http://digilib.stiki.ac.id/repository/how-to-install-minecraft-for-free-on-ios_GM479516143.pdf
    • http://digilib.stiki.ac.id/repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000529b.bin
b5fbc9618dbe5602929e10b30b1f80048da169dc8cd7e31f769889d3041372f0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x529B 24980 bytes
font_01_sfnt_off00008bcf.bin
10e3d6d4c1aa2acb782ec5fe4578af0b4e1926e69ee2a069bc58ed716041f98a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BCF 19596 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.