Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4011a48546ffbaa…

MALICIOUS

PDF

34.4 KB Created: 2021-07-07 23:16:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: c9a6eec27cc1f7dc95d76a760c24768b SHA-1: c81669d35e348435bd847cffef27ea3a780d8900 SHA-256: d4011a48546ffbaa4e3ea2bd2b34d935cdf8c1e13e121861d03bff45a02f866f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free Robux and game hacks to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, likely serving as a gateway to further malicious content or downloads. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/apps-for-free-robux-game-hack In PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/youtube-roblox-zombie-attack-hack_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/free-5-richest-accounts-on-roblox_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/comment-cheat-sur-roblox-avec-cheat-engine_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/mcdonaldsville-roblox-hack-script_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/coin-master-free-spins-link-without-human-verification_GM406889139.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/hack-para-robux-real_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/free-wallpapers-for-roblox_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/hack-coin-master-site-rssingcom_GM406889139.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/roblox-com-hack-robux_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/free-shirt-creator-roblox_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/black-tshirt-roblox-free_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/get-free-robux-gg_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_off00002fd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD7 22436 bytes
SHA-256: 0bcd6eed48280cf271d8d6494ad9a277724f932965aa18d92adbc5ba0594ffd8
font_01_sfnt_off000061eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61EB 18892 bytes
SHA-256: df0695e8e414f92383b05cae98b613e4d3bf43c4f5b9d50f5c032a7a1c976e11

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