Malicious PDF — malware analysis report

Static analysis result for SHA-256 37dc753976ec5a86…

MALICIOUS

PDF

45.6 KB Created: 2021-05-16 07:30:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: de840b4b18ecf567f153448c89eb2c02 SHA-1: de91f0bbad4e6d88858d4f25107c82c8e62df72c SHA-256: 37dc753976ec5a860f0201152bd1803435fc9e2a02e40ed0ca2fd4a1f6e1b5b9
102 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to websites that appear to offer game hacks and cheats, indicating a likely phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a 'download button' lure further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/431946152/roblox-help-free-robux-game-hack
    • http://spentulib.com/search/repository/coin-master-hack-app-for-iphone_GM406889139.pdf
    • http://spentulib.com/search/repository/free-robux-hack-generator_GM431946152.pdf
    • http://spentulib.com/search//repository/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • http://spentulib.com/search/repository/coin-master-free-spins-hack_GM406889139.pdf
    • http://spentulib.com/search/repository/coin-master-free-spin-and-coin-link-today_GM406889139.pdf
    • http://spentulib.com/search/repository/free-robux-hack_GM431946152.pdf
    • http://spentulib.com/search/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdf
    • http://spentulib.com/search/repository/coin-master-unlimited-spins-apk-free-download_GM406889139.pdf
    • http://spentulib.com/search//repository/roblox-hack-unlimited-robux_GM431946152.pdf
    • http://spentulib.com/search/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://spentulib.com/search/repository/roblox-com-free-robux_GM431946152.pdf
    • http://spentulib.com/search//repository/free-robux-without-human-verification-2021_GM431946152.pdf
    • http://spentulib.com/search//repository/how-to-get-free-robux-com_GM431946152.pdf
    • http://spentulib.com/search//repository/free-daily-spins-coin-master_GM406889139.pdf
    • http://spentulib.com/search//repository/free-spins-coin-master-hack-2021_GM406889139.pdf
    • http://spentulib.com/search//repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
    • http://spentulib.com/search//repository/websites-that-give-free-robux_GM431946152.pdf
    • http://spentulib.com/search//repository/easy-robux-hack_GM431946152.pdf
    • http://spentulib.com/search//repository/play-minecraft-free-online-no-download_GM479516143.pdf
    • http://spentulib.com/search//repository/how-to-get-free-robux-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bb9.bin
400a4c15d4a4bff57df0eae223ada164f149771964bd7221d9cb494ef4612e4b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BB9 26136 bytes
font_01_sfnt_off000085d7.bin
10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85D7 2880 bytes
font_02_sfnt_off00008fc2.bin
4686decc205f725eac2af31d2bb610515d085fb80a4fbb870416018a21b04127		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC2 18264 bytes

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