Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0754c0025ec2344…

MALICIOUS

PDF

47.1 KB Created: 2021-06-03 23:30:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b590c99364b3df3ee0beec68ff7b8589 SHA-1: d638ee82b25f1b1e20f58c9f05e92bc9fec8bc7b SHA-256: a0754c0025ec234426bb879a9313b19bb0fc9939cd457ecdc79ea8b34b164e87
102 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which appear to be part of a link farm designed to drive traffic to potentially malicious sites. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a "download button" lure further suggests an attempt to trick users into navigating to these external resources, which could lead to malware downloads or scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/406889139/pop-slots-free-vegas-casino-slot-machine-game-coin-master-game-hack
    • http://elibrary.uinbanten.ac.id/repository/pubg-uc-rate-in-india_GM1330123889.pdf
    • http://elibrary.uinbanten.ac.id/repository/how-to-send-free-spins-on-coin-master_GM406889139.pdf
    • http://elibrary.uinbanten.ac.id/repository/free-spins-and-coins-coin-master-app_GM406889139.pdf
    • http://elibrary.uinbanten.ac.id/repository/how-do-i-get-free-coins-in-coin-master_GM406889139.pdf
    • http://elibrary.uinbanten.ac.id/repository/daily-coin-master-link_GM406889139.pdf
    • http://elibrary.uinbanten.ac.id/repository/free-robux-generator-com-roblox-hack_GM431946152.pdf
    • http://elibrary.uinbanten.ac.id/repository/free-minecraft-coins_GM479516143.pdf
    • http://elibrary.uinbanten.ac.id/repository/coins-master-hacks_GM406889139.pdf
    • http://elibrary.uinbanten.ac.id/repository/how-to-get-free-robux-for-real_GM431946152.pdf
    • http://elibrary.uinbanten.ac.id/repository/como-hackear-coin-master-iphone_GM406889139.pdf
    • http://elibrary.uinbanten.ac.id/repository/microsoft-rewards-robux_GM431946152.pdf
    • http://elibrary.uinbanten.ac.id/repository/real-working-coin-master-hack_GM406889139.pdf
    • http://elibrary.uinbanten.ac.id/repository/minecraft-free-unblocked_GM479516143.pdf
    • http://elibrary.uinbanten.ac.id/repository/free-coin-master-spins_GM406889139.pdf
    • http://elibrary.uinbanten.ac.id/repository/free-robux-on-phone_GM431946152.pdf
    • http://elibrary.uinbanten.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdf
    • http://elibrary.uinbanten.ac.id/repository/robux-generators-that-actually-work_GM431946152.pdf
    • http://elibrary.uinbanten.ac.id/repository/free-attacks-on-coin-master_GM406889139.pdf
    • http://elibrary.uinbanten.ac.id/repository/coin-master-stop-attack-hack_GM406889139.pdf
    • http://elibrary.uinbanten.ac.id/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050a3.bin
d6f1a54811c743f32f48eb9de524119d2af40605a6077121d0997115e84648a0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50A3 24852 bytes
font_01_sfnt_off000089bc.bin
e5f6ec650849eefe6bc6a1649c2875ce35328d23e4196945bba66cc43e5a49d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89BC 2820 bytes
font_02_sfnt_off0000935a.bin
1c2867144f4dcbe006f7dd1ea5adad3b4b3257689db3166d94319e477c45a36b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x935A 18960 bytes

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