Malicious PDF — malware analysis report

Static analysis result for SHA-256 71f1a95df00f53ca…

MALICIOUS

PDF

46.9 KB Created: 2021-06-03 06:05:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: df3ed0ac3a56f0bc282dd3276c9914dd SHA-1: f9f4bdbf80434ace3bf6507fe54c757ec402f34f SHA-256: 71f1a95df00f53cadd993a766de69f17f24faf84e4671605d82caad8e0a0af98
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a malicious website, masquerading as a 'free generator / game hack'. This lure is often used to trick users into downloading malware or providing sensitive information. The presence of a password-protected archive lure further suggests an attempt to conceal malicious content from security gateways.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/google-how-do-you-get-free-robux-game-hack In PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/pokeballs-in-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-progamers_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-spins-gratis_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spins-link-june-2021_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/rbx-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/com-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/easy-robux-com_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-minecraft-premium-account_GM479516143.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_off0000518d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x518D 28780 bytes
SHA-256: f69e6dd4d74e1a1eabbd5bf3ad7c3546ede2912b8a19bcf24185d73cbaa185d4
font_01_sfnt_off0000929d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x929D 18972 bytes
SHA-256: 7e42234451cc840f7005e057c881a5adaeb6eb05dfbb8a23217c49a1ae6b06df

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