Malicious PDF — malware analysis report

Static analysis result for SHA-256 923f3d0c61bdd4eb…

MALICIOUS

PDF

43.3 KB Created: 2021-05-16 13:36:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e082aa6f15f67edca4e374790962d342 SHA-1: d6e358345f82c6973701e9e8bc5707e53f40e80c SHA-256: 923f3d0c61bdd4eb583fbda2ef5770533cd790e261d0658171f196aef533d4e8
142 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, masquerading as a download for a Minecraft mod. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm or redirection scheme. The presence of a 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests that the linked content may be password-protected to evade initial scanning, further increasing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/479516143/minecraft-gun-mod-download-free-game-hack
    • http://sebastiaanshoeve.nl/images/you-promised-my-son-free-robux_GM431946152.pdf
    • http://sebastiaanshoeve.nl/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • http://sebastiaanshoeve.nl/images/coin-master-free-spin-codes_GM406889139.pdf
    • http://sebastiaanshoeve.nl/images/bux-gg-robux-free_GM431946152.pdf
    • http://sebastiaanshoeve.nl/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://sebastiaanshoeve.nl/images/coin-master-heaven-free-spins-today_GM406889139.pdf
    • http://sebastiaanshoeve.nl/images/minecraft-bedrock-edition-pc-download-free_GM479516143.pdf
    • http://sebastiaanshoeve.nl/images/legit-coin-master-hack-without-verification_GM406889139.pdf
    • http://sebastiaanshoeve.nl/images/free-robux-mobile_GM431946152.pdf
    • http://sebastiaanshoeve.nl/images/get-free-spins-on-coin-master-links_GM406889139.pdf
    • http://sebastiaanshoeve.nl/images/coin-master-claim-spins_GM406889139.pdf
    • http://sebastiaanshoeve.nl/images/free-robux-with-no-human-verification_GM431946152.pdf
    • http://sebastiaanshoeve.nl/images/how-to-get-minecraft-for-free-on-pc_GM479516143.pdf
    • http://sebastiaanshoeve.nl/images/minecraft-realms-free-trial_GM479516143.pdf
    • http://sebastiaanshoeve.nl/images/free-robux-games-that-actually-work-2021_GM431946152.pdf
    • http://sebastiaanshoeve.nl/images/free-coins-coin-master_GM406889139.pdf
    • http://sebastiaanshoeve.nl/images/minecraft-hack-mod_GM479516143.pdf
    • http://sebastiaanshoeve.nl/images/free-minecraft-hacks_GM479516143.pdf
    • http://sebastiaanshoeve.nl/images/coin-master-play-online-free_GM406889139.pdf
    • http://sebastiaanshoeve.nl/images/coin-master-hack-software_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c31.bin
7d5fdf5d33d76388ed545970c40e346b79d3a858866d0b00e2ac07eb3fea4790
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C31 25672 bytes
font_01_sfnt_off00008675.bin
a1a6f3ae66b5d922a0a4092004751a3e9c0d20fb317db8442b8cbfc32d6436e9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8675 18428 bytes