Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14b8198c75d9a5f…

MALICIOUS

PDF

35.4 KB Created: 2021-07-06 11:43:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1457763dc847e1c60513b21a30831b39 SHA-1: c9d8228f32d5cddbd9033ec23adb8d2a138e6eeb SHA-256: d14b8198c75d9a5f72f1069f3a77a2361c500fd859c71e3ce91ec2270898742c
162 Risk Score

Malware Insights

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

This PDF document is designed to lure users into clicking a link by presenting a fake CAPTCHA and offering 'free Robux' or game hacks. The primary link directs to a suspicious domain, likely serving as a downloader for a second-stage payload. The document's structure and content strongly suggest a phishing or social engineering attack aimed at compromising the user's system.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://netcdn.tw/app/431946152/roblox-promo-codes-free-robux-game-hack PDF link annotation
    • http://apps.esqbs.ac.id/ebs_library/repository/free-robux-net_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/case-clicker-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/how-to-get-free-robux-2021-july_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/hack-roblox-payant_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/hack-coin-master-for-iphone_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-robux-hack-quick-and-easy_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/hack-roblox-pc-sur-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://apps.esqbs.ac.id/ebs_library/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000325b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x325B 22732 bytes
SHA-256: d3b46b09a2b7d8dd7b928072f449a6994c66971d9f8574c327f7fabfe157031f
font_01_sfnt_off00006489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6489 19380 bytes
SHA-256: f599988ad614928277529a5070f43d57f30efd84bc389ab6e612c4c8b358aa39

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