Malicious PDF — malware analysis report

Static analysis result for SHA-256 a47b6edb10cd83b8…

MALICIOUS

PDF

37.9 KB Created: 2021-06-25 10:45:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 27990ad4e7f5d47e49a2f64c3f7d201b SHA-1: c6683283ac2400899d565e12d0f6dd1356e67564 SHA-256: a47b6edb10cd83b8933c8b3832e1f79a91f574f720ff8dbc8ca2f760abe0f099
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are part of a link farm designed to direct users to pages offering game cheats and hacks. The primary URL, http://netcdn.co/app/431946152/free-game-passes-on-roblox-game-hack, and the extensive list of linked PDFs suggest a social engineering attempt to trick users into downloading further malicious content or visiting compromised sites. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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/free-game-passes-on-roblox-game-hack PDF link annotation
    • http://pustaka.pasca.unand.ac.id/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/bloxburg-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/free-free-robux-for-android_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/how-to-hack-roblox-accounts-2021-agust_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/roblox-taxi-simulator-brick-cars-edition-give-all-cars-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/roblox-robot-inc-cheat_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/how-to-hack-in-roblox-murderer-mystery-2_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/roblox-guess-that-character-for-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/free-money-roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/base-wars-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/how-to-hack-some-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/hacks-for-roblox-apocalypse-rising_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/roblox-cheat-codes-for-tix_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/how-to-get-free-robux-2021-without-builders-club_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/how-to-cheat-in-roblox-find-the-doges_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/roblox-online-free-no-sign-up_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BF3 22960 bytes
SHA-256: 547db22296c58e5d19c339bcff253f68e1f0623257ad4e4879d42dd4e889f5b1
font_01_sfnt_off00006f6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F6D 19064 bytes
SHA-256: 34ed450cf05771257e5ab0e72ff304b09f7616f4f3625cf2ce865bdbd600ea40

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