Malicious PDF — malware analysis report

Static analysis result for SHA-256 a28c77251fb8ae19…

MALICIOUS

PDF

34.1 KB Created: 2021-06-26 23:58:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 426931528aa62f3e202826ed575d0721 SHA-1: ab67e1d7f4d3657a44e31d3624468a192735c438 SHA-256: a28c77251fb8ae1933986585ba545dc9f3238199cb36c89307bf9e481ff599ed
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free currency to entice users to click on embedded links. The primary link, http://netcdn.co/app/431946152/como-me-hago-hacker-en-roblox-game-hack, is identified as a redirector, suggesting it leads to a malicious website or download. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate a phishing or malware distribution attempt, likely leveraging social engineering.

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/como-me-hago-hacker-en-roblox-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-minecraft-for-free-2021_GM479516143.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/synapse-free-roblox_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-code-for-free-spins_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-roblox-injector-september-2021_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/pokemon-go-free-7km-eggs-june-2021_GM1094591345.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5F 22000 bytes
SHA-256: e9622de661f086b6c311277e328e9c71b7d87974b14139f534c8092d22c31fb7
font_01_sfnt_off0000603b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x603B 19112 bytes
SHA-256: b860fdf07c1ee44fbad0503da64763afc6e0637319aa6bffde7992f1a142a113

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