Malicious PDF — malware analysis report

Static analysis result for SHA-256 57d004f258a98fe7…

MALICIOUS

PDF

36.2 KB Created: 2021-06-30 03:31:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 7dff91df3ef289deffcff89018ac392f SHA-1: 365ddab602b0b85b5ab138dabc060f65ea107f84 SHA-256: 57d004f258a98fe73af1b086bf8e3f4d123d6a9a3394a1f020dbcdfe01052436
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded URLs and text that mimic game-related content, specifically for Roblox and Coin Master, to trick users into downloading malicious files. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the primary URL leads to known malicious infrastructure, likely serving as a downloader for a second-stage payload. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-btools-script-hack-site:v3rmillion.net-game-hack In PDF document text
    • https://tecturatw.com/image/data/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/free-100-robux_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/coin-master-apk_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/comment-cheat-sur-stand-online-roblox_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/coin-master-daily-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/hack-para-roblox-flood-escape-2_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/cheat-engine-roblox-65_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/wil-they-cheat-roblox-thumbnail_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/free-catalog-things-you-never-knew-existed-roblox_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/coin-master-game-hack-link_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/mcpe-optifine_GM479516143.pdfIn PDF document text
    • https://tecturatw.com/image/data/files/free-robux-generator-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
font_00_sfnt_off000032e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32E9 23044 bytes
SHA-256: 24b948981097e14bff9b096268dd20a1f002a93949aa4d0066ea45d2e01a4874
font_01_sfnt_off000066b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66B1 19668 bytes
SHA-256: 7aff9d245004e8b830ff1fa8fe70bc570cdbb4cc08268ceaa831465ba326b8d7

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