Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc002c85345f1a8e…

MALICIOUS

PDF

44.7 KB Created: 2021-06-02 14:36:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 21bddfcb4b9ac3e6281ad52ce3d990d2 SHA-1: 7df071030170517acaadf8a32d65f43fbff6cf9b SHA-256: bc002c85345f1a8e5158dee62aa4a151903905f7553f09caa1e1d9f6ce5ca4aa
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are structured as SEO-optimized PDF links, suggesting a link farm. The document body, though partially corrupted, contains a URL pointing to a 'free roblox script corrector' which is likely a lure. The presence of a password archive lure heuristic indicates the document may be designed to trick users into believing they need a password to access a downloaded file, which is a common tactic for evading initial security scans.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/free-roblox-script-corrector-discord-game-hack
    • https://www.tsdb.com.au/images/how-to-get-free-pet-food-in-coin-master_GM406889139.pdf
    • https://www.tsdb.com.au/images/free-pe_GM479516143.pdf
    • https://www.tsdb.com.au/images/is-minecraft-education-edition-free_GM479516143.pdf
    • https://www.tsdb.com.au/images/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • https://www.tsdb.com.au/images/mangocheats-com-hack-coin-master-cheat_GM406889139.pdf
    • https://www.tsdb.com.au/images/minecraft-free-no-virus_GM479516143.pdf
    • https://www.tsdb.com.au/images/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdf
    • https://www.tsdb.com.au/images/how-to-hack-roblox-accounts-passwords_GM431946152.pdf
    • https://www.tsdb.com.au/images/minecraft-for-ps3-free_GM479516143.pdf
    • https://www.tsdb.com.au/images/free-rare-cards-for-coin-master_GM406889139.pdf
    • https://www.tsdb.com.au/images/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdf
    • https://www.tsdb.com.au/images/coin-master-hack-without-verification-2021_GM406889139.pdf
    • https://www.tsdb.com.au/images/links-for-free-spins-for-coin-master_GM406889139.pdf
    • https://www.tsdb.com.au/images/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdf
    • https://www.tsdb.com.au/images/free-robux-codes-2021_GM431946152.pdf
    • https://www.tsdb.com.au/images/how-to-hack-robux_GM431946152.pdf
    • https://www.tsdb.com.au/images/codes-to-get-free-robux_GM431946152.pdf
    • https://www.tsdb.com.au/images/descargar-hack-coin-master_GM406889139.pdf
    • https://www.tsdb.com.au/images/roblox-free-clothes-codes_GM431946152.pdf
    • https://www.tsdb.com.au/images/free-robux-codes-no-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fee.bin
8d1499ddce1fd8ea0fb8eed0d3df78af10149919a6d228e9569e3c2b69904a3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x4FEE 26088 bytes
font_01_sfnt_off00008b0f.bin
5b6ccb2f3c8584f88470a0f53693628e8e45cf929689d29a75c428793393136f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B0F 18692 bytes