Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1c03db03ada6027…

MALICIOUS

PDF

36.2 KB Created: 2021-07-04 19:32:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: da83b44450ebad012965d900b1133341 SHA-1: 2f4a8bdbe7fa15036b3cbdc63fb898979f2f4bf0 SHA-256: a1c03db03ada60270c519d4f2d3813be105fa0d6faaf61c5348497dc5bc945f0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a game hack lure to trick users into clicking embedded links. The primary link, http://netcdn.tw/app/406889139/coin-master-70-spin-link-2021-game-hack, and numerous others hosted on cintabaca.org, likely lead to malicious websites or further malware downloads. The ML classifier strongly indicated maliciousness, supporting the observed redirection and lure techniques.

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.tw/app/406889139/coin-master-70-spin-link-2021-game-hack PDF link annotation
    • http://cintabaca.org/katalog//repository/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-hack-script-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-cheat-engine-bypass-march-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-roblox-exploit-injector_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-bee-swarm-simulator-free-honey_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-hack-dantdm-on-roblox-and-give-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/apps-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-hack-jailbreak-in-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-free-robux-for-wiewers_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-falling-roblox-codes_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/earn-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-how-to-get-free-accses-to-welcome-to-bloxburg_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/comment-hacker-roblox-android_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/minecraft-gun-mod-download-free_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/what-is-the-best-free-for-all-roblox-game_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-old-avatar_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-shirt-design-maker-roblox_GM431946152.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_off000037bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37BD 22460 bytes
SHA-256: 88340f87568da2ce6348f6274a45d954a9d302bb80e1b6692196809dcfce1ab9
font_01_sfnt_off000069a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69A5 18640 bytes
SHA-256: 15121af3aaca2a4d002688ab4f70cd272963d47b7b01ecd679e2d556af85fb23

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