Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e2d31b1aa15d08b…

MALICIOUS

PDF

35.7 KB Created: 2021-06-25 14:58:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 30748912b692c26a8af228c44c29f86d SHA-1: 9559f24d91e0c89b2cf4b585804290e14ec16840 SHA-256: 4e2d31b1aa15d08b4d19456bbc6cfcfd535e3558e01e4af7c6be47f803eeb25b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, masquerading as free game hacks or generators. The document body and heuristics indicate a lure for users to click these links, likely leading to further malicious content or downloads. No scripts were extracted, but the presence of multiple malicious redirector links is a strong indicator of 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 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.co/app/431946152/free-things-on-roblox-2021-game-hack In PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/roblox-phantom-forces-hacks-fly_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/download-hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/free-nike-roblox-shirts_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/free-robux-wheel_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/free-robux-download_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/hack-version-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/coin-master-instagram-free-spins_GM406889139.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/how-to-change-your-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/houe-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/free-robux-net_GM431946152.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://cursocejas.com.br/imagens/userfiles/files/100-free-spins-coin-master_GM406889139.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_off00003207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3207 22976 bytes
SHA-256: 5a46b60cfa781b3f3526450d1a206500b2f5ba8f8a5822bbadd321a43444594e
font_01_sfnt_off00006590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6590 19336 bytes
SHA-256: 6d9bbb95d2b85e3b21b8570ce6a9c7cdfd1211f3089395242f0f1f2232be5c21

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