Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3acb4cc905f2406…

MALICIOUS

PDF

34.6 KB Created: 2021-06-26 01:44:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 42aff8fc3870259190cc48311225da2b SHA-1: 4440fcc4bea53a31df9ba75eeec8f742caf80e38 SHA-256: b3acb4cc905f2406d7167a351166d5ea986c7e5d7f2769a0edb06d312a7d7f42
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document uses a lure related to free game items and hacks to entice users to click on malicious links. The primary link, http://netcdn.co/app/431946152/free-shirt-download-roblox-game-hack, is designed to redirect users to potentially harmful content. While no scripts were directly extracted, the PDF structure and embedded URLs strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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.co/app/431946152/free-shirt-download-roblox-game-hack PDF link annotation
    • http://elib-s2.ubl.ac.id/repository/free-roblox-code-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-gift-card-free-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/best-games-in-roblox-to-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-cbro-cheats_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-get-the-roblox-20-body-for-free_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-to-hack-any-game-in-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/stella-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/extreme-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-item-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-strucid-free-skin-code_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-hack-booga-booga-download_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-mac-exploit-for-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/cheat-gg-roblox_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/roblox-how-to-get-free-followers_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/dantdm-free-robux-code_GM431946152.pdfIn PDF document text
    • http://elib-s2.ubl.ac.id/repository/how-do-u-get-free-robux-2021_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_off00002eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB9 22568 bytes
SHA-256: e102a13a9dffc7c1bf8382d9a88c66a2f353af18160168f43a9659ae24bc2b92
font_01_sfnt_off000060d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D2 19548 bytes
SHA-256: 63056797ad765e431e57a06faa669be178d54f1905db53ec23a00dd0a877b039

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