Malicious PDF — malware analysis report

Static analysis result for SHA-256 5241fef86b5fe8d0…

MALICIOUS

PDF

42.1 KB Created: 2021-05-12 07:55:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e924911d50d3badae4610887b6629d9c SHA-1: b81f058096eec96b5f8569323032879930b4cefe SHA-256: 5241fef86b5fe8d07d042ed4b4b7d313a2a394ba881ffc7792f1d77cdbb76912
100 Risk Score

Malware Insights

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

The PDF document contains a link to known malicious infrastructure, specifically a URL associated with game-related lures. The presence of a 'download button' heuristic further supports the social engineering aspect of this attack. While no scripts were directly extracted, the PDF structure and malicious link indicate an attempt to redirect the user to a malicious download site, likely to deliver a second-stage payload.

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/479516143/minecraft-free-download-android-apk-0.14-0-game-hack In PDF document text
    • http://gops.pruszczgdanski.pl/images/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/earn-robux-websites_GM431946152.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/static-moonactive-net_GM406889139.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/roblox-tracker_GM431946152.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/coin-master-hack-apk-with-fb-login-2021_GM406889139.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/chisel-and-bits-mod-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://gops.pruszczgdanski.pl/images/coin-master-games-hack_GM406889139.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_off00004874.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4874 24596 bytes
SHA-256: 280e2daa034134e3c320dd08e820bf8d4e32d1a66009c6eec976675e8ec9d4e4
font_01_sfnt_off00007fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDB 19044 bytes
SHA-256: a5267b563baeeb74a90941775a753387a3f7a1649177b0733d928be729f6d9df