Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d553cbab0a04718…

MALICIOUS

PDF

44.9 KB Created: 2021-06-08 16:37:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 15480a21e9143b54b630bc9348159078 SHA-1: 5950f7ed14fbce3bee01b0ed526ef5da5fc7ca73 SHA-256: 5d553cbab0a047182edee09827b0926e897996b0b87e08f2a939c76110e058d9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which are related to game cheats and free items, suggesting a lure for users to visit potentially malicious websites. The ML classifier also flagged this PDF as malicious with a high probability. The document body and embedded links indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/free-t-shirt-model-roblox-game-hack
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/free-robux-no-survey-mobile_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/hack-money-roblox-lumber-tycoon-2_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/free-items-on-roblox-mobile_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/instalar-roblox-hackeado-para-android_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/fnaf-roblox-songs-cheats_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/what-to-do-if-your-roblox-account-gets-hacked_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/roblox-robux-hack-no-survey_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/robux-free-2021_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/minecraft-bedrock-edition-free_GM479516143.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/project-alpha-roblox-hack_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/free-robux-generator-no-survey_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/roblox-robux-generator-free-download-no-surveys_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/roblox-cheat-supercheats_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/coin-master-free_GM406889139.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/your-free-trial-of-living-has-expired-roblox-meme_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/free-roblox-promo-codes-2021-not-expired_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/hack-roblox-vehicle-simulator-money_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/how-to-get-free-robux-items_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/bux-com-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053d6.bin
91e392ead45f051522ca2e0123b613485909cd6b676d87cf7d344f6efef13d08
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53D6 24336 bytes
font_01_sfnt_off00008bec.bin
65af57e184e6ad45ecb4d351c17c135c56bb428d793da686f52dd19ee0cf2f2d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BEC 18708 bytes