Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbeecbe8121adfaf…

MALICIOUS

PDF

40.8 KB Created: 2021-05-13 06:45:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 15ae6c27df3037023770e68c09ba4f4e SHA-1: e78b95b449814ba3226a9e1465d3b2f650acde42 SHA-256: bbeecbe8121adfafce4523e7aadcf78da720c7fcf3ba5f36b27d50f7d6eb6c80
102 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which are SEO-optimized and point to other PDF documents, forming a link farm. One of the primary embedded URLs, 'https://netcdn.xyz/app/479516143/minecraft-esp-game-hack', suggests the user is being lured into downloading a malicious application disguised as a game hack. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/479516143/minecraft-esp-game-hack
    • http://precitool.ch/images/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdf
    • http://precitool.ch/images/coin-master-free-spins-link-today-new_GM406889139.pdf
    • http://precitool.ch/images/roblox-promo-codes-for-free-robux_GM431946152.pdf
    • http://precitool.ch/images/real-free-spins-for-coin-master_GM406889139.pdf
    • http://precitool.ch/images/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdf
    • http://precitool.ch/images/free-robux-com-no-verification_GM431946152.pdf
    • http://precitool.ch/images/coin-master-hacks-for-free-spins_GM406889139.pdf
    • http://precitool.ch/images/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdf
    • http://precitool.ch/images/roblox-hack-codes_GM431946152.pdf
    • http://precitool.ch/images/coin-master-gift-link-hack_GM406889139.pdf
    • http://precitool.ch/images/minecraft-server-hacks_GM479516143.pdf
    • http://precitool.ch/images/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdf
    • http://precitool.ch/images/coin-master-free-link-2021_GM406889139.pdf
    • http://precitool.ch/images/free-robux-no-human-verification-and-no-survey_GM431946152.pdf
    • http://precitool.ch/images/coin-master-free-spins--coins-2021_GM406889139.pdf
    • http://precitool.ch/images/how-to-change-roblox-username-for-free_GM431946152.pdf
    • http://precitool.ch/images/free-coin-master-spins-blog_GM406889139.pdf
    • http://precitool.ch/images/coin-master-free-spins-link_GM406889139.pdf
    • http://precitool.ch/images/noob-vs-pro-vs-hacker-vs-god-minecraft_GM479516143.pdf
    • http://precitool.ch/images/roblox-getting-hacked_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000480a.bin
446ed72be45d0385334e45ad1f71f492d582ad0350a376fdfc17440b994c0cd8
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x480A 24064 bytes
font_01_sfnt_off00007ec5.bin
59b3e86a83a8b48f6a50c00be9eaa50fd65e0e132b07e4d63de227813bd77a7a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC5 17744 bytes