Malicious PDF — malware analysis report

Static analysis result for SHA-256 007b46a392c5cee9…

MALICIOUS

PDF

45.8 KB Created: 2021-05-11 19:00:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 027103750551ff92c3d8cc991720084d SHA-1: b445071db1c8cff529496bcd8a4370039d401b8c SHA-256: 007b46a392c5cee93d5c94420d3635c51b38cffff352a97955869e1b7b70f8cb
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which are SEO-optimized to appear as legitimate download pages for popular games. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to trick users into downloading further malware. The primary IOCs are the external URLs used in the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/406889139/download-coin-master-free-spins-link-2021-today-game-hack
    • http://muckrossparkcollege.com/images/free-spin-codes-coin-master_GM406889139.pdf
    • http://muckrossparkcollege.com/images/free-spins-for-coin-master-app_GM406889139.pdf
    • http://muckrossparkcollege.com/images/minecraft-free-exe_GM479516143.pdf
    • http://muckrossparkcollege.com/images/coin-master-heaven-daily-free-spins-and-coins-links_GM406889139.pdf
    • http://muckrossparkcollege.com/images/free-robux-websites-that-work_GM431946152.pdf
    • http://muckrossparkcollege.com/images/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdf
    • http://muckrossparkcollege.com/images/minecraft-pe-free-download_GM479516143.pdf
    • http://muckrossparkcollege.com/images/coin-master-ios-hack_GM406889139.pdf
    • http://muckrossparkcollege.com/images/coin-master-free-spin-ml_GM406889139.pdf
    • http://muckrossparkcollege.com/images/free-games-coin-master_GM406889139.pdf
    • http://muckrossparkcollege.com/images/free-robux-without-verification-2021_GM431946152.pdf
    • http://muckrossparkcollege.com/images/robloxheroxyz-free-robux_GM431946152.pdf
    • http://muckrossparkcollege.com/images/coin-master-free-spins-link-today-haktuts_GM406889139.pdf
    • http://muckrossparkcollege.com/images/free-coin-link-coin-master_GM406889139.pdf
    • http://muckrossparkcollege.com/images/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • http://muckrossparkcollege.com/images/oprewards-free-robux_GM431946152.pdf
    • http://muckrossparkcollege.com/images/coin-master-hack-apk-android_GM406889139.pdf
    • http://muckrossparkcollege.com/images/como-hackear-coin-master-2021-espaol_GM406889139.pdf
    • http://muckrossparkcollege.com/images/coin-master-spin-hack-pc_GM406889139.pdf
    • http://muckrossparkcollege.com/images/coin-master-game-hack-version-download_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ab7.bin
aedfad5e3d08970363ff34de743f0909b635b4cf4b46a0492eacfa5776580ccc
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AB7 25028 bytes
font_01_sfnt_off00008417.bin
96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
pdf-font-stream PDF embedded font (sfnt) at offset 0x8417 2820 bytes
font_02_sfnt_off00008db8.bin
525b4923e2ec08582fc0eec02dda3c6a08e890396aaafa489cf9c2f67061961a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DB8 19220 bytes