Malicious PDF — malware analysis report

Static analysis result for SHA-256 99055cadc8db3930…

MALICIOUS

PDF

35.2 KB Created: 2021-07-03 10:35:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 64199381b8a477ba710ef50f12c2d8c8 SHA-1: e6fd5c889856a3aab3832b2888341d2d68b3a74c SHA-256: 99055cadc8db39300d01ef1d517adf80764fd9a7205b2a8513dc0c3cebe874e0
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a 'download button' lure, strongly suggesting a phishing or scam attempt. The ML classifier also flagged this PDF as malicious with high confidence. The document's content and the presence of many links pointing to game-related 'hacks' and 'free spins' indicate a social engineering tactic to trick users into visiting potentially malicious sites.

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.co/app/406889139/how-to-get-free-spins-on-coin-master-game-hack
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/coin-master-free-spins-a2z-help_GM406889139.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/minecraft-114-4-download_GM479516143.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/coin-master-daily-free-spins-link-2021_GM406889139.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/dgeler-rocach-earn-free-robux_GM431946152.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/mcpe-master-coins-hack-download_GM406889139.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/unpatchable-free-robux-made-by-robuxian-for-roblox_GM431946152.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/how-to-add-mods-to-minecraft-pe_GM479516143.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/free-spin-gratis-coin-master_GM406889139.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/free-robux-generator-2021_GM431946152.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/roblox-free-coins_GM431946152.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/roblox-free-dragon-ball-z-map_GM431946152.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/free-robux-with-no-survey_GM431946152.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/roblox-skybox-hack_GM431946152.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/easy-robux-today-com_GM431946152.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/minecraft-free-ios-2021_GM479516143.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/roblox-high-school-free-rhs-cash-no-human-verification_GM431946152.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/roblox-free-chemises-furious-jumpe_GM431946152.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/noclip-hack-roblox-jailbreak-download_GM431946152.pdf
    • http://jdih.ptun-denpasar.go.id/assets/CKImages/files/pokemon-go-free-promo-codes-march-2021_GM1094591345.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031cc.bin
7619c3ccc5338e563456c0b50cf6203d73258838fc91f02f6202fed0c1a98a76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31CC 23460 bytes
font_01_sfnt_off000066e8.bin
f6486e4c00d3cdc8b5d1192946ddbf803be47e84f44f52a8e54ea271a052a700		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66E8 18336 bytes

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