Malicious PDF — malware analysis report

Static analysis result for SHA-256 f71a28a1dcfccd85…

MALICIOUS

PDF

52.6 KB Created: 2021-06-08 13:30:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bbfa27cf08367fbbdf6a79b00acd8c18 SHA-1: a0df0f93c20d4061ce4d20ceeff490ed979780bd SHA-256: f71a28a1dcfccd8535a2d297f91a879bd7a75a117311c7b734d7b68cd72ee9c0
100 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, disguised as a download for game cheats. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious redirector and a call-to-action button suggests an attempt to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

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.tw/app/431946152/no-cheat-minimap-roblox-1.12.2-game-hack In PDF document text
    • http://eurocomes.com/images/coin-master-free-spins-11-01-2021_GM406889139.pdfIn PDF document text
    • http://eurocomes.com/images/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • http://eurocomes.com/images/how-to-hack-coin-master-with-root_GM406889139.pdfIn PDF document text
    • http://eurocomes.com/images/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • http://eurocomes.com/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://eurocomes.com/images/coin-master-hack-generator-tool_GM406889139.pdfIn PDF document text
    • http://eurocomes.com/images/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://eurocomes.com/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://eurocomes.com/images/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://eurocomes.com/images/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdfIn PDF document text
    • http://eurocomes.com/images/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdfIn PDF document text
    • http://eurocomes.com/images/coin-master-connection-lost_GM406889139.pdfIn PDF document text
    • http://eurocomes.com/images/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://eurocomes.com/images/free-robux-real_GM431946152.pdfIn PDF document text
    • http://eurocomes.com/images/coinmaster-hack_GM406889139.pdfIn PDF document text
    • http://eurocomes.com/images/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://eurocomes.com/images/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://eurocomes.com/images/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://eurocomes.com/images/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://eurocomes.com/images/android-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000524c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x524C 27852 bytes
SHA-256: 6e0db48b064e88ea2ea05c7e82987a132be471a94116c35d2fd9b59ef0f5df99
font_01_sfnt_off00009178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9178 2828 bytes
SHA-256: db1860fd79a3f2cbe32e2bada3ba4c68a2d581b7a24294387cd777233cc9cef6
font_02_sfnt_off00009b2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B2A 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_03_sfnt_off0000a7d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7D2 19332 bytes
SHA-256: e3398b0480357a37591562736e27b88707bc2fc16645e7162bb9a3ea6c5d2a50

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