Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ce94f543a16abc1…

MALICIOUS

PDF

42.3 KB Created: 2021-05-16 22:09:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 816916e3f5ce1bcdeb36a531197bc21f SHA-1: 0b19f1d56f46ac4796e796e411765383daff7835 SHA-256: 3ce94f543a16abc17dafe30343038db9ca0737834e88e03c0c608f5771d510e8
102 Risk Score

Malware Insights

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

The PDF document contains a lure for free Minecraft hacks, directing users to a URL that likely hosts a malicious payload. It also exhibits a link farm behavior, embedding numerous links to other PDF documents, suggesting a coordinated effort to distribute malware or lead users to phishing sites. The ML classifier strongly indicates maliciousness.

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/479516143/free-minecraft-bedrock-server-game-hack
    • http://killebergsridsport.se/images/coin-master-free-coins-and-spins_GM406889139.pdf
    • http://killebergsridsport.se/images/how-to-get-free-minecraft-coins_GM479516143.pdf
    • http://killebergsridsport.se/images/coin-master-free-spins-hack_GM406889139.pdf
    • http://killebergsridsport.se/images/www-robux-com_GM431946152.pdf
    • http://killebergsridsport.se/images/free-spins-for-coin-master_GM406889139.pdf
    • http://killebergsridsport.se/images/coin-master-free-spins-2021_GM406889139.pdf
    • http://killebergsridsport.se/images/coin-master-free-spins-link-blogspot_GM406889139.pdf
    • http://killebergsridsport.se/images/link-for-free-spins-on-coin-master_GM406889139.pdf
    • http://killebergsridsport.se/images/rbl-gg-free-robux_GM431946152.pdf
    • http://killebergsridsport.se/images/free-chest-coin-master_GM406889139.pdf
    • http://killebergsridsport.se/images/free-robux-link_GM431946152.pdf
    • http://killebergsridsport.se/images/how-to-get-free-roebucks-on-roblox_GM431946152.pdf
    • http://killebergsridsport.se/images/earn-free-robux-on-roblox_GM431946152.pdf
    • http://killebergsridsport.se/images/how-to-get-free-snacks-on-coin-master_GM406889139.pdf
    • http://killebergsridsport.se/images/free-robux-games-that-actually-work-2021_GM431946152.pdf
    • http://killebergsridsport.se/images/free-coin-master-spins-daily_GM406889139.pdf
    • http://killebergsridsport.se/images/coin-master-free-spins-activegamer_GM406889139.pdf
    • http://killebergsridsport.se/images/free-robux-generator-2021-no-human-verification_GM431946152.pdf
    • http://killebergsridsport.se/images/coin-master-rewards_GM406889139.pdf
    • http://killebergsridsport.se/images/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b52.bin
fab0b547070255b78093db6cca45951f47467270b8107768867a628089abe48d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B52 24800 bytes
font_01_sfnt_off000082d3.bin
91126a517b1f6fe08fde59393e56e1de7cf034d0066f3393bf7fbc33808ed0e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82D3 18384 bytes

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