Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6b13c2e14dc81b3…

MALICIOUS

PDF

33.7 KB Created: 2021-06-30 12:47:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 838f76e7235b4380b3d236a46cd0a7fa SHA-1: 2ff1285475cd7dfec0ae6756f990ec323a9b3f94 SHA-256: d6b13c2e14dc81b353278ada153c092172b0827084d870d9312f5997049b0611
102 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which are presented as download buttons or promises of free in-game currency for popular games. The heuristic firings indicate a mass of external links and a high ML classification score, strongly suggesting a malicious intent to redirect users to potentially harmful websites. The document body and extracted URLs point towards a lure for game-related exploits or scams.

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/431946152/comment-hacker-dans-roblox-pcc-game-hack PDF link annotation
    • http://multiconfianca.com.br/ckfinder/userfiles/files/free-robux-no-human-verification-2021-working_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/how-to-hack-any-roblox-game-2021_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/how-to-get-a-shirt-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/how-to-get-free-coins-on-robowling-roblox_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/roblox-robux-page_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/free-robux-not-fake-2021_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/free-robux-no-apps-to-download_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/coin-master-free-spins-without-verification_GM406889139.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/all-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/roblox-exploit-gui-free_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/how-to-make-hacks-with-studio-roblox_GM431946152.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/coin-master-connection-lost_GM406889139.pdfIn PDF document text
    • http://multiconfianca.com.br/ckfinder/userfiles/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E48 21644 bytes
SHA-256: 9666e6cecf780703a675c4f799403c778762ab9322cde3faa4f676c896402d62
font_01_sfnt_off00005d98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D98 19344 bytes
SHA-256: 8db3bcb10d005585b10819d7cb53635b897d60a61c146495c654f225ef9f8512

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