Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4916d4ddbef0d74…

MALICIOUS

PDF

36.1 KB Created: 2021-07-03 14:24:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b9222aa9dce1b763ae5efc57be51b41c SHA-1: 6a086b6a55dfd2bbec94a1a79df38c9046cbc36b SHA-256: c4916d4ddbef0d7475ae6a713aadfc8c9cf949f6a088e3d4a6166395704d9830
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a known malicious domain, masquerading as a game hack or free spins generator. The heuristic firings confirm the presence of malicious redirector links and a lure for game-related cheats. While no scripts were extracted, the document's primary function appears to be directing users to potentially harmful external content, likely as a first step in a phishing or malware distribution chain.

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/406889139/coin-master-free-spins-and-coins-daily-links-game-hack In PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/202100-robux-promo-code-free_GM431946152.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/how-to-get-free-animations-on-roblox_GM431946152.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/free-robux-card-id_GM431946152.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/how-to-hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/roblox-script-executor-free-download-2021_GM431946152.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/free-minecraft-skins-pe_GM479516143.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/roblox-hacks-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/free-spins-in-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/easy-robux-today_GM431946152.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/roblox-hack-android-2021_GM431946152.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/what-roblox-hack-works_GM431946152.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://milagrosjogja.com/ckfinder/userfiles/files/coin-master-com_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_off00003589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3589 22844 bytes
SHA-256: c000bd1bedd58e490b3390b6369e53c85d9d67cb04ef319b52d385874bc999da
font_01_sfnt_off0000687a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x687A 18940 bytes
SHA-256: c0dcd974f4fe980c6a922a1d67dca4592269afdacb350ab691b189b4ca5ba35f

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