Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f0f14646305cd46…

MALICIOUS

PDF

42.5 KB Created: 2021-05-15 04:02:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2d1e6deccddb0d309fd8b9b953de1a10 SHA-1: 78e394f9ad46d64fa62d4c4d6c90583f9a5ddc13 SHA-256: 1f0f14646305cd4671b17329fe9779b650896646c1f3767d7115435e8548202f
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, which is a strong indicator of malicious intent. The document body and extracted URLs suggest a lure related to game hacks (Coin Master, Robux), likely to trick users into downloading a payload or visiting a phishing site. No scripts were extracted, but the presence of a malicious redirector and the nature of the lures strongly suggest a downloader or phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 3

  • 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 https://netcdn.xyz/app/406889139/gamesoffice.net-hack-coin-master-game-hack In PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/cone-master_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/mcpe-free-download_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-get-free-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-minecraft-wallpaper_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/www-rbxhut-com_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c87.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C87 25060 bytes
SHA-256: 931b29ffe5233752317c59f6497cc3ed1c9f3d0f19b32aa9514a80eed30141c8
font_01_sfnt_off00008476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8476 18044 bytes
SHA-256: 29769621f517b9af2b6051fd62e22acd3f15304c2918e063dab3d8ffe0b29dd9

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