Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa32e567f2781c64…

MALICIOUS

PDF

49.2 KB Created: 2021-06-13 21:12:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5db958718a9bbac55c66e7a333c9ebdb SHA-1: 1d8a7530faab345320afef3496e14af4cc176436 SHA-256: aa32e567f2781c6450ba1411d5c532f0292fe48d0e081660295d2fc5d5c20cdb
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a link farm, strongly suggesting a phishing or malware distribution attempt. The document body and extracted URLs explicitly mention game hacks and generators, indicating a lure to trick users into downloading malicious content. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://netcdn.co/app/431946152/roblox-pubg-hack-game-hack
    • http://www.perpustakaan.unda.ac.id/repository/robux-generator-com_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/free-coin-master-gifts_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id//repository/pokemon-go-hack-free-coins-no-human-verification_GM1094591345.pdf
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id/repository/earn-free-robux-on-roblox_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/how-to-hack-coin-master_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-hack-ios-download_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id//repository/free-coin-master-hacks-no-verification_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-hack-2021_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id//repository/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdf
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-free-spins-link-2021-hack_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id//repository/hack-robux_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-free-robux-on-iphone_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/free-minecraft-client_GM479516143.pdf
    • http://www.perpustakaan.unda.ac.id//repository/legit-coin-master-hack-no-human-verification_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id//repository/worst-roblox-avatars_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/lucky-patcher-coin-master-hack_GM406889139.pdf
    • http://www.perpustakaan.unda.ac.id/repository/get-free-robux-2021_GM431946152.pdf
    • http://www.perpustakaan.unda.ac.id/repository/free-unlimited-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ac8.bin
dc39ead8cbaee8046969e6b030f541f0dfdc8d043ee9214fc08553adecef3552		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AC8 37772 bytes
font_01_sfnt_off00009ce6.bin
180bf396a83fd657b948e25a5d297da909b319a868a748d90e2a9dfb2e48f1f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CE6 18764 bytes

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