Malicious PDF — malware analysis report

Static analysis result for SHA-256 444d5e709cbab812…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 22:41:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7b9ca6b37670e06db5f17611c9855ebe SHA-1: 70045765b286707c2cf972481e437e13afab5d75 SHA-256: 444d5e709cbab8121a009682a623e18a195743e7359c9e6d6aa5b0856c2bfce4
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for 'free Robux' and game hacks, directing users to the URL http://netcdn.tw/app/431946152/free-robux-codes-game-hack. This URL is flagged as a redirector for game hacks. The presence of such lures, combined with the ML classifier flagging the PDF as malicious, strongly suggests a phishing or malware distribution attempt. No scripts were extracted, but the document's content and linked URL indicate a social engineering tactic to trick users into visiting a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-codes-game-hack PDF link annotation
    • http://www.library.umbjm.ac.id/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/is-there-a-way-to-get-free-bobux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-dino-hat-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-free-robux-2021-to-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/pokemon-go-free-644_GM1094591345.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-hack-noclip-speed-hack-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-boombox-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-spin-ios_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/link-for-free-spins-on-coin-master_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/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/gaming-dunia-coin-master-free-spins_GM406889139.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_off00002f7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F7B 21936 bytes
SHA-256: c435f80918a7867e8b3cbfb7539113eba729312e54f15647c259d1a8551eb304
font_01_sfnt_off00005faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAA 18888 bytes
SHA-256: 0b210ae1d2f25d9b8ac974921f9fa88679103a832855b836aa7747c7a59cf8bc

Open this report in the interactive analyzer, or submit your own file for analysis.