Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd7aa235965df9d6…

MALICIOUS

PDF

34.3 KB Created: 2021-06-25 14:29:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b283f37a14ab59e8f82c59a513a50dee SHA-1: d9b887226dbb6e1ffb178a6ad896e5c81bd04ff7 SHA-256: cd7aa235965df9d6b147b6e065443f60873bffba72fa487183f2626a27426338
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links and a document body that promotes free in-game items and currency for popular games. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, and the ML_NYX_PDF_MALICIOUS score is very high, suggesting malicious intent. The primary goal appears to be directing users to download potentially harmful files or visit scam websites.

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-girl-roblox-clothes-game-hack PDF link annotation
    • https://bartonprivate.com.au/sites/default/files/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/coin-master-free-spins-link-quora_GM406889139.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/how-to-robux-hack-yourself_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/how-do-i-get-items-for-free-roblox_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/roblox-speed-hack-2021_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/tiktok-free-fans-2021_GM835599320.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/blackout-hack-roblox_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/free-exploits-for-roblox-mac_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/how-to-hack-a-hacker-on-roblox_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/bunny-ears-2021-free-roblox_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/cm-free-spin-link-today_GM406889139.pdfIn PDF document text
    • https://bartonprivate.com.au/sites/default/files/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3030 22036 bytes
SHA-256: 195f7bebc396cf3fff9962068e518b4591062dab8676dbbd0db3e6b53e45fd1b
font_01_sfnt_off0000611e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611E 19040 bytes
SHA-256: c194885f67a5cc66e5de14b4e9d20f914e36c333ab87a8db9a7759df0f902fca

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