Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad3a963fe72fb165…

MALICIOUS

PDF

47.2 KB Created: 2021-06-03 06:30:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 23d571bc026e0eff101c711d11e9eaaa SHA-1: a458f675bbb3998d5ec9998b5e76a6108938517f SHA-256: ad3a963fe72fb165e0ee927584e441fa43fd0669cdc80504de53b96a91b7231d
102 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a malicious lure, likely aiming to trick users into downloading unwanted software or visiting malicious sites. The presence of numerous external links, including a primary URL pointing to a game download, and the 'PDF_SEO_LINK_FARM' heuristic suggest an attempt to manipulate search engine results or distribute further malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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-pocket-edition-free-download-game-hack PDF link annotation
    • http://pustaka.ffarmasi.unand.ac.id/repository/free-robux-clan_GM431946152.pdfIn PDF document text
    • http://pustaka.ffarmasi.unand.ac.id/repository/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://pustaka.ffarmasi.unand.ac.id/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://pustaka.ffarmasi.unand.ac.id/repository/good-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://pustaka.ffarmasi.unand.ac.id/repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://pustaka.ffarmasi.unand.ac.id/repository/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.ffarmasi.unand.ac.id/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.ffarmasi.unand.ac.id/repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://pustaka.ffarmasi.unand.ac.id/repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.ffarmasi.unand.ac.id/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ffarmasi.unand.ac.id/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ffarmasi.unand.ac.id/repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://pustaka.ffarmasi.unand.ac.id/repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.ffarmasi.unand.ac.id/repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ffarmasi.unand.ac.id/repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ffarmasi.unand.ac.id/repository/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://pustaka.ffarmasi.unand.ac.id/repository/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://pustaka.ffarmasi.unand.ac.id/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ffarmasi.unand.ac.id/repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://pustaka.ffarmasi.unand.ac.id/repository/minecraft-realms-free_GM479516143.pdfIn 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_off0000551c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x551C 28484 bytes
SHA-256: c0189e4e5c33a40ac3df9e3b5d51bde1106fe025e640d855ee555d29af1d45c6
font_01_sfnt_off0000951d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x951D 18616 bytes
SHA-256: 74c3d0dac38db02fae044005a19145e6493ffdefda41676fc7dac63f0b05f007

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