Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b66d72b3154b22b…

MALICIOUS

PDF

34.9 KB Created: 2021-06-29 01:20:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c4c685e680490796de2ccc83c94d9882 SHA-1: 54b5ea17c25da8c1f5438ef2c36b36fe5423712a SHA-256: 8b66d72b3154b22b5a21292b72f2a2a26e799e362dd91fceca89fe832f326bea
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on the andhrarealty.in domain and appear to be part of a link farm. The primary URL http://netcdn.co/app/431946152/get-free-robux-in-1-minute-game-hack, along with others, suggests a lure for free in-game currency or cheats. The ML classifier also flagged this PDF as malicious with high confidence.

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/get-free-robux-in-1-minute-game-hack
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/app-store-coin-master-free-spins_GM406889139.pdf
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/robloxmatchcom-free-robux_GM431946152.pdf
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/comment-hacker-un-jouer-roblox_GM431946152.pdf
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/how-to-make-hack-models-in-roblox_GM431946152.pdf
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/rbx-free-robux_GM431946152.pdf
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/roblox-death-sound-free-download-to-mp3_GM431946152.pdf
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/free-spins-coin-master-2021-today_GM406889139.pdf
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/comment-cheater-sur-roblox-franais-sur-jailbreak-levels-airdrops_GM431946152.pdf
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/cool-outfits-on-roblox-for-free_GM431946152.pdf
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/minecraft-games-online-free-no-download_GM479516143.pdf
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/roblox-naruto-final-bond-ninetails-hack_GM431946152.pdf
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdf
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/robux-free-c_GM431946152.pdf
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/is-there-a-hack-to-get-free-robux_GM431946152.pdf
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/how-do-you-get-free-robux-on-roblox-2021_GM431946152.pdf
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/weight-champion-cheat-codee-on-roblox_GM431946152.pdf
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/money-hack-roblox-jailbreak-2021_GM431946152.pdf
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdf
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/free-spins-coin-master-without-completing-offers_GM406889139.pdf
    • https://www.andhrarealty.in/uploaded_files/userfiles/files/bad-minecraft-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000310b.bin
d4d21f8900e3010222cbe6b2c0bfa75a353f4bca5ddd98b8487ab0f3c6f41081
pdf-font-stream PDF embedded font (sfnt) at offset 0x310B 22372 bytes
font_01_sfnt_off000062c0.bin
1cbec3fa2585d5576cf794d2aa8625a3331cb5ab0d65fab713f035599843267d
pdf-font-stream PDF embedded font (sfnt) at offset 0x62C0 19244 bytes