Malicious PDF — malware analysis report

Static analysis result for SHA-256 57b9ccba8f94cae8…

MALICIOUS

PDF

35.2 KB Created: 2021-06-19 02:13:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: db305818b2c6c293065ea5e749095389 SHA-1: f4aa2b5f6bdbe9fc3123cbae44935aff5ce1225e SHA-256: 57b9ccba8f94cae8b6f29ac2fc5c5fd28427a1deba8b0728e14a92d20a440480
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to a known malicious redirector, disguised as game hacks and generators. The primary lure URL is http://netcdn.co/app/431946152/free-wknd-strucid-alpha-roblox-lua-script-game-hack, which is associated with malicious redirector infrastructure. The document body and heuristics confirm the intent to trick users into clicking these links, likely leading to further malware downloads or phishing pages.

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-wknd-strucid-alpha-roblox-lua-script-game-hack In PDF document text
    • http://www.europeancamerata.com/userfiles/files/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/descargar-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/coin-master-hack-spin-160-pro_GM406889139.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/download-a-free-generator-for-robux-no-website_GM431946152.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/free-robux-place_GM431946152.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/free-tiktok-likes-generator_GM835599320.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/free-online-roblox-download_GM431946152.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/free-apk-mod-coin-master_GM406889139.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/how-to-download-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://www.europeancamerata.com/userfiles/files/coin-master--hack_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_off00002f8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F8D 22580 bytes
SHA-256: 0755339a527df602e1015cf18acbeadbf6e7d21bc84b3cdb43effb8241906fd6
font_01_sfnt_off0000620e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x620E 19900 bytes
SHA-256: a0e7a30d6958749af3019f5a9be7776ecdde2401cd63cc019a64a5bedc9ed2e1

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