Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbac5c9d8c3f2da0…

MALICIOUS

PDF

35.0 KB Created: 2021-06-19 09:36:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 11553a0779849ef2a7057b3fe0f1a18a SHA-1: 6f82a8808f9205d7934d26f5e695fa66defdfafa SHA-256: fbac5c9d8c3f2da028e216557aca96bdb9f1d1f300d4c9d2a6a880038ac56cfb
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links to external websites, many of which are structured as SEO link farms for game-related cheats and hacks. The ML classifier strongly indicates maliciousness, and the presence of download-oriented text suggests a lure for users to download further malicious content. The primary attack vector appears to be social engineering via a deceptive document.

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/how-to-hack-roblox-vampire-hunters-2-game-hack
    • http://olimpik.mk/imagescke/upload/files/pubg-10-000-uc-free_GM1330123889.pdf
    • http://olimpik.mk/imagescke/upload/files/how-to-hack-a-roblox-account-2021_GM431946152.pdf
    • http://olimpik.mk/imagescke/upload/files/how-to-hack-someone-on-roblox_GM431946152.pdf
    • http://olimpik.mk/imagescke/upload/files/daily-free-spins-for-coin-master_GM406889139.pdf
    • http://olimpik.mk/imagescke/upload/files/robux-matchcomfree-robux_GM431946152.pdf
    • http://olimpik.mk/imagescke/upload/files/free-spins-in-coin-master-2021_GM406889139.pdf
    • http://olimpik.mk/imagescke/upload/files/get-free-spins-on-coin-master_GM406889139.pdf
    • http://olimpik.mk/imagescke/upload/files/windows-10-minecraft-free-with-java_GM479516143.pdf
    • http://olimpik.mk/imagescke/upload/files/block-best-robux_GM431946152.pdf
    • http://olimpik.mk/imagescke/upload/files/how-to-get-free-clothing-on-roblox_GM431946152.pdf
    • http://olimpik.mk/imagescke/upload/files/free-daily-spins-coin-master-2021_GM406889139.pdf
    • http://olimpik.mk/imagescke/upload/files/free-robux-without-downloading-anything_GM431946152.pdf
    • http://olimpik.mk/imagescke/upload/files/coin-master-free-spins-hack-2021_GM406889139.pdf
    • http://olimpik.mk/imagescke/upload/files/how-to-hack-roblox-and-get-unlimited-robux_GM431946152.pdf
    • http://olimpik.mk/imagescke/upload/files/mistplay-robux_GM431946152.pdf
    • http://olimpik.mk/imagescke/upload/files/how-to-get-free-robux-on-chromebook_GM431946152.pdf
    • http://olimpik.mk/imagescke/upload/files/hacks-in-roblox-jailbreak_GM431946152.pdf
    • http://olimpik.mk/imagescke/upload/files/coin-master-latest-mod-apk-free-download_GM406889139.pdf
    • http://olimpik.mk/imagescke/upload/files/tiktok-free-views-2021_GM835599320.pdf
    • http://olimpik.mk/imagescke/upload/files/oprewards-com-earn_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003046.bin
fabb992bedfbf83636ad08ea0041ac81470f142dc3eb3a33e6936b781424b5b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x3046 22164 bytes
font_01_sfnt_off00006148.bin
d956b57d025418ea90cee56634a2c6496b6b21906acde7b325dbb35acd168070
pdf-font-stream PDF embedded font (sfnt) at offset 0x6148 19880 bytes