Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ddb8f93ccbbc6d6…

MALICIOUS

PDF

44.9 KB Created: 2021-05-12 11:30:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: cd5a8c04d5a8603cfb48d19c06f7cafc SHA-1: 7bc5a5f1ed8adfefe8ec8138c1be7292dc3e03d7 SHA-256: 3ddb8f93ccbbc6d659ba83a2bc555ddb5657b54f15ff6b3cbd1896d293add855
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with malicious links. It also exhibits characteristics of a link farm, with numerous external PDF links pointing to potentially harmful content. The primary goal appears to be redirecting users to scam or malware-hosting sites, as indicated by the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/rbxfree-com-free-robux-game-hack
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coin-master-hack-pc-free_GM406889139.pdf
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/free-robux-gift-card-generator_GM431946152.pdf
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/minecraft-free-ios_GM479516143.pdf
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coin-master-hack-online-download_GM406889139.pdf
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/minecraft-pocket-edition-free-download_GM479516143.pdf
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/roebucks-on-roblox_GM431946152.pdf
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coin-master-free-spin-daily-link_GM406889139.pdf
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/how-do-u-get-free-robux-2021_GM431946152.pdf
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coin-master-hack-xyz-download_GM406889139.pdf
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/mcpe-master-free-coins_GM406889139.pdf
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/haktuts-coin-master-free-spin-link_GM406889139.pdf
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification-code_GM406889139.pdf
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/como-hackear-coin-master-iphone_GM406889139.pdf
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coin-master-official-page_GM406889139.pdf
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/coin-master-free-spin-today-2021_GM406889139.pdf
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/robux-win_GM431946152.pdf
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-hack_GM431946152.pdf
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/free-spins-coin-master-daily_GM406889139.pdf
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/robux-hack-tools_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cff.bin
a15058abd4acbdcadaabfbcc7a43391f085eeec0ff7bcb9e194e7c641537d77a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CFF 27416 bytes
font_01_sfnt_off00008d94.bin
3458f47f0b0e4c5d178391a23bbf01d917f000ba7933fbc297d15d2e5240f022		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D94 18276 bytes

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