Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c407e94451eadf7…

MALICIOUS

PDF

46.1 KB Created: 2021-06-03 05:11:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 45b35ff982db590260a2c447ebc007cd SHA-1: b230bbff060f14b24a47394085eb794273a63c14 SHA-256: 7c407e94451eadf7de0b82ea086076ac121fe8b1061f164b0d1807215e808c08
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are disguised as links to game-related content like 'minecraft-ore-finder-mod-game-hack' and 'coin-master-unlimited-spin-link'. The presence of a 'Visual download / call-to-action button lure' heuristic, combined with the ML classifier flagging the PDF as malicious, strongly suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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.online/app/479516143/minecraft-ore-finder-mod-game-hack
    • http://perpus.masda.ac.id//repository/coin-master-unlimited-spin-link_GM406889139.pdf
    • http://perpus.masda.ac.id/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdf
    • http://perpus.masda.ac.id//repository/play-minecraft-for-free-on-pc_GM479516143.pdf
    • http://perpus.masda.ac.id/repository/minecraft-anarchy-server-no-hacks_GM479516143.pdf
    • http://perpus.masda.ac.id/repository/coin-master-hacks-and-cheats_GM406889139.pdf
    • http://perpus.masda.ac.id//repository/coin-master-hack-pro-gamers_GM406889139.pdf
    • http://perpus.masda.ac.id//repository/coin-master-cheats-2021_GM406889139.pdf
    • http://perpus.masda.ac.id/repository/free-roblox-generator-for-roblox_GM431946152.pdf
    • http://perpus.masda.ac.id/repository/coin-master-free-gold-cards_GM406889139.pdf
    • http://perpus.masda.ac.id/repository/games-like-minecraft-but-free_GM479516143.pdf
    • http://perpus.masda.ac.id//repository/free-robux-only-username_GM431946152.pdf
    • http://perpus.masda.ac.id//repository/free-roblox-accounts-with-robux_GM431946152.pdf
    • http://perpus.masda.ac.id//repository/roblox-free-robux_GM431946152.pdf
    • http://perpus.masda.ac.id/repository/free-roblox-accounts_GM431946152.pdf
    • http://perpus.masda.ac.id//repository/coin-master-free-spins-and-coins_GM406889139.pdf
    • http://perpus.masda.ac.id//repository/free-roblox-followers-generator_GM431946152.pdf
    • http://perpus.masda.ac.id/repository/coin-master-hack-2021-ios_GM406889139.pdf
    • http://perpus.masda.ac.id/repository/how-to-get-free-robux-without-email_GM431946152.pdf
    • http://perpus.masda.ac.id//repository/free-robux-no-survey-or-human-verification_GM431946152.pdf
    • http://perpus.masda.ac.id/repository/free-robux-no-human-verification-generator_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005078.bin
6b289676cc369b19e390e2efb093d69d5362680b0c8098d14f1dbb1cf95afd8a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5078 24780 bytes
font_01_sfnt_off00008811.bin
ec5b53a4cfc036793012016ef4f285cbee44a9211bc915a56bb2d401c881b1c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8811 3208 bytes
font_02_sfnt_off000092bb.bin
3d0c275330d6a7b87118e225175bc9b431f0584a36e1632c85eac693847a7bcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92BB 17884 bytes

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