Malicious PDF — malware analysis report

Static analysis result for SHA-256 f10181ee3953eeea…

MALICIOUS

PDF

47.5 KB Created: 2021-06-04 03:50:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: b33b808b69bc52d87fbe9fa068c9d669 SHA-1: d8b0c91c60fd2bc529187794c15ed1e6cb79b7c0 SHA-256: f10181ee3953eeeaf8d9cc559707e57e7e3b87042f825a9fca11ff8c60cdebfe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'free coins' lures. The primary malicious URL identified is https://netcdn.online/app/1094591345/pokemon-go-free-coins-no-survey-game-hack. The document's structure and embedded links strongly suggest a social engineering tactic to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 4

  • 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.
  • 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/1094591345/pokemon-go-free-coins-no-survey-game-hack In PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/fan-page-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spins-link-blogspot-april-2021_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/tiktok-free-download-for-iphone_GM835599320.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-online-game_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/get-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-sexually_GM431946152.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
font_00_sfnt_off000050d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50D7 26260 bytes
SHA-256: 257dda6eb195e2cc1c6496bd1bcc539b95e43e6a3ecd677047657e0db0215158
font_01_sfnt_off00008c5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C5C 3052 bytes
SHA-256: 023c06a54c825fb267937d79c784852103cabe1d1cf0a38f7c1d3aa851dda6df
font_02_sfnt_off000096ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96FF 18396 bytes
SHA-256: 0282a69b3e93924641d55b6ecddfaaec86b82986892263012357cb725971d24f

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