Malicious PDF — malware analysis report

Static analysis result for SHA-256 556f311860bad041…

MALICIOUS

PDF

43.1 KB Created: 2021-05-12 00:02:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f2c2334f295836b238115c2f108469e9 SHA-1: 282bba6e014ca885db6af58f656a5c948e9fcc80 SHA-256: 556f311860bad0412c1d122223eed1e5390b235de8b9a577a8d8402732c1d7c1
142 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a malicious lure, employing a fake CAPTCHA or human verification prompt to trick users into interacting with embedded links. The document contains a large number of external links, many of which point to SEO-optimized PDF files related to game hacks and free in-game currency, suggesting a scam or phishing attempt. The primary malicious URL identified is https://netcdn.xyz/app/431946152/how-to-get-free-robux-no-verification-2021-game-hack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/how-to-get-free-robux-no-verification-2021-game-hack
    • http://apps.esqbs.ac.id/ebs_library/repository/how-to-change-your-username-on-roblox-for-free_GM431946152.pdf
    • http://apps.esqbs.ac.id/ebs_library/repository/coin-master-hack-apk-33-download_GM406889139.pdf
    • http://apps.esqbs.ac.id/ebs_library/repository/free-24-7-minecraft-server_GM479516143.pdf
    • http://apps.esqbs.ac.id/ebs_library/repository/coin-master-free-spins-link_GM406889139.pdf
    • http://apps.esqbs.ac.id/ebs_library/repository/free-robux-no-verification-no-survey_GM431946152.pdf
    • http://apps.esqbs.ac.id/ebs_library/repository/cm-free-spin-link-today_GM406889139.pdf
    • http://apps.esqbs.ac.id/ebs_library/repository/kuso-icu-roblox-hack_GM431946152.pdf
    • http://apps.esqbs.ac.id/ebs_library/repository/how-to-coin-master-spin-hack_GM406889139.pdf
    • http://apps.esqbs.ac.id/ebs_library/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
    • http://apps.esqbs.ac.id/ebs_library/repository/free-robux-no-human-verification-or-survey_GM431946152.pdf
    • http://apps.esqbs.ac.id/ebs_library/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdf
    • http://apps.esqbs.ac.id/ebs_library/repository/how-do-i-get-free-robux_GM431946152.pdf
    • http://apps.esqbs.ac.id/ebs_library/repository/free-spins-coin-master-2021-today_GM406889139.pdf
    • http://apps.esqbs.ac.id/ebs_library/repository/coin-master-cheats_GM406889139.pdf
    • http://apps.esqbs.ac.id/ebs_library/repository/moonactive-coin-master-free-spins_GM406889139.pdf
    • http://apps.esqbs.ac.id/ebs_library/repository/how-to-exploit-roblox_GM431946152.pdf
    • http://apps.esqbs.ac.id/ebs_library/repository/coin-master-free-spin-and-coin-links_GM406889139.pdf
    • http://apps.esqbs.ac.id/ebs_library/repository/minecraft-book-collection_GM479516143.pdf
    • http://apps.esqbs.ac.id/ebs_library/repository/free-coins-coin-master-daily_GM406889139.pdf
    • http://apps.esqbs.ac.id/ebs_library/repository/coin-master-hack-pro_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048f5.bin
ac9850ce08329ca947fcfa3c1fbfccc9aade00235da0c6baff183e81306329c5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48F5 25128 bytes
font_01_sfnt_off00008340.bin
96effbdae210045e90f33644c7199b62eda4c51e6e40441412be2e574896d09f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8340 19164 bytes

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