Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c6286e00b8292ce…

MALICIOUS

PDF

34.2 KB Created: 2021-07-03 11:39:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a3ba48e80b2ac61b49d0de979aa54b0a SHA-1: 6b0a2fe890e8925c364bbbb2aa2ebc842ff9b1fc SHA-256: 8c6286e00b8292ce166e7376561f04c99307075f7c2bc2616cba1b49115a8d5b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links to external websites, many of which are related to game hacks and free in-game currency, suggesting a phishing or malware distribution lure. The ML classifier strongly indicated maliciousness, and the presence of a link farm heuristic further supports this. The document body itself contains text and URLs that reinforce the theme of obtaining free game resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.tw/app/431946152/real-free-robux-codes-game-hack
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/coin-master-hack-8-ball-pool_GM406889139.pdf
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus//repository/free-robux-no-verification-no-download_GM431946152.pdf
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/how-to-hack-for-roblox_GM431946152.pdf
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus//repository/free-spins-for-coin-master-app_GM406889139.pdf
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/roblox-how-to-get-private-server-for-free_GM431946152.pdf
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus//repository/coin-master-free-link-app_GM406889139.pdf
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/roblox-robux-hack-no-survey-2021_GM431946152.pdf
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/roblox-forest-free_GM431946152.pdf
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/roblox-phantom-forces-hack_GM431946152.pdf
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/free-roblox-exploits-for-mac_GM431946152.pdf
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus//repository/how-to-get-minecraft-java-edition-for-free_GM479516143.pdf
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus//repository/coin-master-free-spins-hack-link_GM406889139.pdf
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/coin-master-hack-version-2021-download_GM406889139.pdf
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/rbx-gg-free-robux_GM431946152.pdf
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/how-to-change-your-name-in-roblox-for-free_GM431946152.pdf
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/how-to-get-free-robux-by-a-roblox-code_GM431946152.pdf
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/advertizes-for-free-robux_GM431946152.pdf
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/dinosaur-roblox-hacked_GM431946152.pdf
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/free-robux-no-information-needed_GM431946152.pdf
    • http://perpustakaan.kemenkopmk.go.id/perpus/perpus/repository/roblox-case-clicker-cheats_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030c0.bin
e8e01afa6876228305a4d0c0db7f83d8236498e4a75dda03c4fa6f60eb2d310a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30C0 21800 bytes
font_01_sfnt_off000060b5.bin
9bf96aa8fc5477a53da022985f8b40c56c69568a39855eae0c096d595955e7d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60B5 18964 bytes

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