Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e0acfcdedb2fca9…

MALICIOUS

PDF

48.2 KB Created: 2021-06-03 12:14:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1830926da17a5d37f946ff62bc01801c SHA-1: c29619caf72c00b1c51030321eadd05e6a0ff2f4 SHA-256: 2e0acfcdedb2fca998963022cfa06c3a7ef1bb36860960cf1b56bc5b9778579a
142 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are related to 'free Robux' or 'Coin Master' generators, suggesting a scam or phishing attempt. The presence of a fake CAPTCHA heuristic further supports the malicious intent, aiming to trick users into interacting with malicious links. The primary URL points to a 'free Robux generator' which is a common lure for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/431946152/free-robux-generator-no-survey-no-download-no-human-verification-game-hack
    • https://lib.stie-yai.ac.id/repository/coin-master-free-gifts_GM406889139.pdf
    • https://lib.stie-yai.ac.id/repository/free-robux-with-no-verification_GM431946152.pdf
    • https://lib.stie-yai.ac.id/repository/is-there-a-way-to-get-free-robux_GM431946152.pdf
    • https://lib.stie-yai.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdf
    • https://lib.stie-yai.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • https://lib.stie-yai.ac.id/repository/coin-master-hack-https-coinms-net_GM406889139.pdf
    • https://lib.stie-yai.ac.id/repository/free-robux-that-actually-works-2021_GM431946152.pdf
    • https://lib.stie-yai.ac.id/repository/earn-free-robux-for-roblox_GM431946152.pdf
    • https://lib.stie-yai.ac.id/repository/earn-free-robux-today_GM431946152.pdf
    • https://lib.stie-yai.ac.id/repository/pokemon-go-free-quick-catch_GM1094591345.pdf
    • https://lib.stie-yai.ac.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • https://lib.stie-yai.ac.id/repository/free-robux-no-verification-needed_GM431946152.pdf
    • https://lib.stie-yai.ac.id/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdf
    • https://lib.stie-yai.ac.id/repository/is-minecraft-free-on-xbox-one_GM479516143.pdf
    • https://lib.stie-yai.ac.id/repository/how-to-get-free-robux-on-phone_GM431946152.pdf
    • https://lib.stie-yai.ac.id/repository/free-coin-master-cards_GM406889139.pdf
    • https://lib.stie-yai.ac.id/repository/how-to-recover-a-hacked-pin-in-roblox_GM431946152.pdf
    • https://lib.stie-yai.ac.id/repository/free-robux-survey_GM431946152.pdf
    • https://lib.stie-yai.ac.id/repository/5-easy-ways-to-get-free-robux_GM431946152.pdf
    • https://lib.stie-yai.ac.id/repository/free-robux-easy_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000053c3.bin
fae043f7d14d34b669618420a8a52f6c7b29eb94b7ad0cb04e1363885db5c3af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53C3 24992 bytes
font_01_sfnt_off00008b93.bin
30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B93 2840 bytes
font_02_sfnt_off00009546.bin
3cea6d4f9da734904bcc55369e0b79f4621aa36195ab65246c463812034b9480		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9546 19736 bytes

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