Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c5f2513879e33d4…

MALICIOUS

PDF

33.9 KB Created: 2021-07-09 12:51:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 147a62ab70c12b4dbf5dcecbb16fcdaa SHA-1: cb8488c36e0e9331412a70209dba45af45908265 SHA-256: 1c5f2513879e33d4977b190ec1e8bdd972e28c20fd5e87537e4b762541120a39
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirector infrastructure, specifically advertising 'free generators' and 'hacks' for popular games. The primary malicious link identified is http://netcdn.tw/app/431946152/www-rbxhut-com-game-hack, which likely serves as a gateway to further malicious content or malware. The document's structure and embedded URLs strongly suggest a phishing or social engineering lure to compromise users.

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/www-rbxhut-com-game-hack In PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/minecraft-free-install_GM479516143.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/robux-hack-client-download_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-get-free-coins-and-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/roblox-free-admin-tc2_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-robux-adopt-me_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-t-shirt-design-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-free-spins-2021_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_off00002ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CCD 22316 bytes
SHA-256: 428e4867d075aff8fd5d9b00e093751b636fce7755af09121dc3b9f782252821
font_01_sfnt_off00005e49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E49 19444 bytes
SHA-256: 60eab2e3afd0c7635d159dc58d933a25f8ff147bbc023de726d63f5eb8f1c975

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