Malicious PDF — malware analysis report

Static analysis result for SHA-256 b629ad8a233d817f…

MALICIOUS

PDF

33.8 KB Created: 2021-06-28 05:41:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8c47dc895e59433ad833ba8d0753cc67 SHA-1: 2b4786ffd17901823711c247f4fa2c3b1c0da2b9 SHA-256: b629ad8a233d817f7e6826f4d79dd4b2669538ae471d87bc3acca7e7cf1dae1c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a "PDF_SEO_LINK_FARM" heuristic, leading to sites offering game hacks and "free Robux". The document body and extracted URLs suggest a lure for users seeking cheats for popular games like Roblox and Coin Master. The presence of these links, combined with a high ML classifier score, indicates a malicious intent to redirect users to potentially harmful content or downloads.

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/free-robux-hack-2021-october-game-hack
    • https://de-licht.com/image/data/files/coin-master-hacksco_GM406889139.pdf
    • https://de-licht.com/image/data/files/cheating-hacks-for-coin-master_GM406889139.pdf
    • https://de-licht.com/image/data/files/how-to-get-free-robux-without-human-verification_GM431946152.pdf
    • https://de-licht.com/image/data/files/how-to-cheat-in-guess-the-song-roblox_GM431946152.pdf
    • https://de-licht.com/image/data/files/get-free-coin-master_GM406889139.pdf
    • https://de-licht.com/image/data/files/coin-master-free-spins-link-2021_GM406889139.pdf
    • https://de-licht.com/image/data/files/street-fighting-simulator-infinity-stat-hack-roblox_GM431946152.pdf
    • https://de-licht.com/image/data/files/coin-master-free-spins--coins-2021_GM406889139.pdf
    • https://de-licht.com/image/data/files/free-roblox-generator_GM431946152.pdf
    • https://de-licht.com/image/data/files/youtube-roblox-cheat-engine-arcane-adventures_GM431946152.pdf
    • https://de-licht.com/image/data/files/free-coin-master-game_GM406889139.pdf
    • https://de-licht.com/image/data/files/coin-master-70-spin-link-today_GM406889139.pdf
    • https://de-licht.com/image/data/files/robux-codes-generator-no-human-verification_GM431946152.pdf
    • https://de-licht.com/image/data/files/roblox-free-draw-pen_GM431946152.pdf
    • https://de-licht.com/image/data/files/minecraft-free-no-download_GM479516143.pdf
    • https://de-licht.com/image/data/files/how-to-get-free-items-in-the-roblox-catalog-2021_GM431946152.pdf
    • https://de-licht.com/image/data/files/gain-robux_GM431946152.pdf
    • https://de-licht.com/image/data/files/claim-gg-earn-free-robux_GM431946152.pdf
    • https://de-licht.com/image/data/files/roblox-promo-codes-free-robux_GM431946152.pdf
    • https://de-licht.com/image/data/files/coin-master-for-pc-free-download_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002dee.bin
62536c8a2ceeac43f7e4f7f6bc7d7ee9193dc54a0c82668a1274355cfa159a14
pdf-font-stream PDF embedded font (sfnt) at offset 0x2DEE 21760 bytes
font_01_sfnt_off00005db7.bin
ab62158cdaf79ec533bdb9b29e736238f13ac7621904fb5044ab226646c216ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB7 19392 bytes