Malicious PDF — malware analysis report

Static analysis result for SHA-256 11565da08840a8c3…

MALICIOUS

PDF

48.8 KB Created: 2021-06-03 10:13:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 5a1bcf8ce06026ee06d93ea10b7df7a9 SHA-1: bbd81526f46b2387c1571fe4dd981c9500fa901e SHA-256: 11565da08840a8c359fb8e7f1e1650e91cd8bcd9415b77f50673c56f01739189
122 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • 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 https://netcdn.online/app/479516143/free-minecraft-for-kids-game-hack PDF link annotation
    • http://www.elibrary.perludem.org/repository/free-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/hack-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-spins-2021-blogspot_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/original-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-code-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-generator_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • https://youtuIn 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_004_off000056e3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x56E3 26088 bytes
SHA-256: 605af8c146120864022a2b6294baeb050a20a9ee923792709957367eed6f7ac0
font_01_sfnt_off00009318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9318 2940 bytes
SHA-256: ae8acc7f13e86db3aed98d7dfb73e70e16f4dedb45e9f0467460b76f54e1a1bb
font_02_sfnt_off00009d26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D26 17884 bytes
SHA-256: db9aaf58ea00c011e8bfb0bda6e5c72a5ee10e2312103ce2cdee42fc8763a3fb

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