Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dd00b0bbcef7ea9…

MALICIOUS

PDF

45.0 KB Created: 2021-05-11 01:04:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b34924cb7a8ced82dbbf48e6f6d53c8d SHA-1: 9a17ef16d7c4f3fb391f6746a4dd4f5741b575a1 SHA-256: 7dd00b0bbcef7ea9032aa854f6dbe1d3ecdbee594af74fcbe50ce199a65dd588
142 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure to trick users into clicking malicious links. It also features a link farm with numerous URLs pointing to game-related hacks, suggesting a distribution point for malware. The ML classifier strongly indicated maliciousness, and the presence of external URIs further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/roblox-free-play-game-hack PDF link annotation
    • http://medinup.pt/images/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/wurst-112-2_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-spins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004669.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4669 27204 bytes
SHA-256: b109c14ef935f364f53918c9a0331ae887ae1ac8c341f36206120d765225b5ca
font_01_sfnt_off0000830f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x830F 2824 bytes
SHA-256: bd082aa73fbb1a8b3bd2e5c998d3d8e31d1dfc71ea36f846af746f69a0d2ab7f
font_02_sfnt_off00008cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC3 18512 bytes
SHA-256: eed476aa069bc09357c43ec056cace655c39995f669be6a5bb4491b7d3b62334

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