Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef042f321633c830…

MALICIOUS

PDF

41.9 KB Created: 2021-05-16 17:04:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e23a0a1429ed15e3449163d1bde37704 SHA-1: ce0ecbfd33eb992c35feedad8cdc2c1fc251fa0f SHA-256: ef042f321633c830f2f1c84cb4cf0d6e4db80d5b347e042e323376f97bea106b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, identified as a link farm, likely for SEO manipulation or to redirect users to malicious content. The document body and extracted URLs suggest a lure related to obtaining in-game currency or cheats for popular games. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links indicate a malicious intent to direct users to potentially harmful websites.

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/431946152/how-do-i-get-robux-game-hack
    • https://marcopolosydney.com.au/images/is-there-a-way-to-get-free-robux_GM431946152.pdf
    • https://marcopolosydney.com.au/images/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdf
    • https://marcopolosydney.com.au/images/what-do-points-do-in-roblox_GM431946152.pdf
    • https://marcopolosydney.com.au/images/daily-coin-master-free-link_GM406889139.pdf
    • https://marcopolosydney.com.au/images/can-i-get-robux-for-free_GM431946152.pdf
    • https://marcopolosydney.com.au/images/coin-master-online-free-spin_GM406889139.pdf
    • https://marcopolosydney.com.au/images/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdf
    • https://marcopolosydney.com.au/images/coin-master-official-fan-page_GM406889139.pdf
    • https://marcopolosydney.com.au/images/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdf
    • https://marcopolosydney.com.au/images/can-i-get-free-robux_GM431946152.pdf
    • https://marcopolosydney.com.au/images/mosttechs-coin-master-free-spins_GM406889139.pdf
    • https://marcopolosydney.com.au/images/get-minecraft-windows-10-free_GM479516143.pdf
    • https://marcopolosydney.com.au/images/coin-master-free-spins-iphone_GM406889139.pdf
    • https://marcopolosydney.com.au/images/robux-websites-that-work_GM431946152.pdf
    • https://marcopolosydney.com.au/images/change-roblox-username-free_GM431946152.pdf
    • https://marcopolosydney.com.au/images/coin-master-free-spins-link-today-new_GM406889139.pdf
    • https://marcopolosydney.com.au/images/free-minecraft-pe-server_GM479516143.pdf
    • https://marcopolosydney.com.au/images/games-that-give-you-free-robux_GM431946152.pdf
    • https://marcopolosydney.com.au/images/get-free-gold-cards-in-coin-master_GM406889139.pdf
    • https://marcopolosydney.com.au/images/free-roblox-injector_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047be.bin
a7c53d1612c634675e623cf956637fc47233a19a998aba2002dc5ef614739e68
pdf-font-stream PDF embedded font (sfnt) at offset 0x47BE 25876 bytes
font_01_sfnt_off00008140.bin
76696481b4f85a4b134e50273d4f72d60bf885136cdb061a204ba21e520483fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x8140 18284 bytes