Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f45d317fa45222…

MALICIOUS

PDF

42.8 KB Created: 2021-05-16 04:01:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6ccdc2bd8326bf4552efd78a3b5633b7 SHA-1: 7cf14fbd4c5a4d9fb07199bc1a63146c455502a5 SHA-256: 02f45d317fa4522242d2794bfb004cee8a588ed35310a6d727471aaf66b706e0
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a 'download' button lure, directing users to websites that promise free in-game currency or cheats. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests an attempt to drive traffic to potentially malicious or scam-related content. No scripts were extracted, but the document's structure and embedded URLs point towards a social engineering attack.

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-free-robux-game-hack
    • http://www.callong.cn/uploaded_files/userfiles/files/free-robux-no-verification-required_GM431946152.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/moonactive-coin-master_GM406889139.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/bloxland-earn-free-robux_GM431946152.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/how-to-get-free-robux-without-paying_GM431946152.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/free-spins-coin-master-cheats_GM406889139.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/no-verification-coin-master-hack_GM406889139.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/microsoft-store-robux_GM431946152.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/free-spins-and-coins-coin-master_GM406889139.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/how-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/coin-master-free-spins-1-coin-master_GM406889139.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/free-robux-easy_GM431946152.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/free-minecraft-hosting-24-7_GM479516143.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/link-for-free-coins-in-coin-master_GM406889139.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/free-robux-on-ipad_GM431946152.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/is-minecraft-free-on-pc_GM479516143.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/free-spins-coin-master-2021-hack_GM406889139.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/how-to-hack-coin-master-without-root_GM406889139.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdf
    • http://www.callong.cn/uploaded_files/userfiles/files/how-to-download-minecraft-for-free-ios_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b4d.bin
5d6746d0f2ac399361fe48b13645e06019a789a319503d9590362d702bfae034		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B4D 24724 bytes
font_01_sfnt_off00008457.bin
af4dc877dda7dbd9aa71ce66d9a52868b07d358fe63790b9b74aede2acb33558		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8457 18452 bytes

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