Malicious PDF — malware analysis report

Static analysis result for SHA-256 23df05ede1562005…

MALICIOUS

PDF

42.1 KB Created: 2021-05-13 18:02:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fbd590ebda95c403c897833581b2f740 SHA-1: 6c3fc47d35a3a02bc628dba1141b0bc185013cba SHA-256: 23df05ede156200551d0cea9e5149ffb9ecfddd415d5170b2981c5e668c788f5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document exhibits characteristics of a ClickFix social engineering attack, instructing the user to execute a command to bypass macro restrictions. It contains a prominent external URI pointing to a download for 'minecraft-bedrock-free-download-game-hack', suggesting a lure for potentially unwanted or malicious software. While no scripts were directly extracted, the PDF structure and embedded URLs indicate an attempt to trick the user into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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-bedrock-free-download-game-hack
    • https://www.ruchya.com.tw/upload/files/prison-life-roblox-hacks_GM431946152.pdf
    • https://www.ruchya.com.tw/upload/files/free-coins-coin-master_GM406889139.pdf
    • https://www.ruchya.com.tw/upload/files/free-spins-on-coin-masters_GM406889139.pdf
    • https://www.ruchya.com.tw/upload/files/roblox-games-that-give-you-free-robux_GM431946152.pdf
    • https://www.ruchya.com.tw/upload/files/hack-xp-net-coin-master_GM406889139.pdf
    • https://www.ruchya.com.tw/upload/files/coin-master-village-4_GM406889139.pdf
    • https://www.ruchya.com.tw/upload/files/free-coins-coin-master-2021_GM406889139.pdf
    • https://www.ruchya.com.tw/upload/files/real-coin-master-hack-2021_GM406889139.pdf
    • https://www.ruchya.com.tw/upload/files/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdf
    • https://www.ruchya.com.tw/upload/files/free-robux-websites-that-work_GM431946152.pdf
    • https://www.ruchya.com.tw/upload/files/minecraft-fly-hack_GM479516143.pdf
    • https://www.ruchya.com.tw/upload/files/coin-master-free-daily-spins-link_GM406889139.pdf
    • https://www.ruchya.com.tw/upload/files/free-coin-master-spins-2021_GM406889139.pdf
    • https://www.ruchya.com.tw/upload/files/roblox-system_GM431946152.pdf
    • https://www.ruchya.com.tw/upload/files/roblox-mobile-hack_GM431946152.pdf
    • https://www.ruchya.com.tw/upload/files/how-to-get-free-robux-easy-on-phone_GM431946152.pdf
    • https://www.ruchya.com.tw/upload/files/free-minecraft-bedrock_GM479516143.pdf
    • https://www.ruchya.com.tw/upload/files/free-roblox-scripts_GM431946152.pdf
    • https://www.ruchya.com.tw/upload/files/tiradas-coin-master_GM406889139.pdf
    • https://www.ruchya.com.tw/upload/files/coin-master-game-hacking_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000497a.bin
f6c84d3d28d9d6989df3e14b8ab58019636a6d747d4c72fbf46db18e859d2de0
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x497A 24580 bytes
font_01_sfnt_off000080f3.bin
46ea590fdaaf2f51a0970c42df6cd5b4a0b4c3c6274823dd639632707821995f
pdf-font-stream PDF embedded font (sfnt) at offset 0x80F3 18676 bytes