Malicious PDF — malware analysis report

Static analysis result for SHA-256 a42057d86bd8d0bc…

MALICIOUS

PDF

40.7 KB Created: 2021-05-13 08:47:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1928640f5d0eba295753800e42f7b821 SHA-1: 09f349cef9e984b90ecd4008c1b91958be7b920a SHA-256: a42057d86bd8d0bc456ea167c1f7730893251873ff50850d6bc4a96fe107694f
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links pointing to known malicious redirector infrastructure, specifically leading to a download for 'wurst-client-1.12-2-game-hack'. The ML classifier also flagged this PDF as malicious with high confidence. The document body, though heavily obfuscated, contains references to game hacks and download URLs, reinforcing the lure. The presence of embedded URLs and the malicious redirector link strongly suggest an attempt to trick the user into downloading and executing a secondary 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/wurst-client-1.12-2-game-hack In PDF document text
    • http://solidcommunication.ch/images/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • http://solidcommunication.ch/images/coin-master-daily-spin-link_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://solidcommunication.ch/images/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/free-spin-coin_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/free-robux-please_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://solidcommunication.ch/images/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/where-to-get-robux_GM431946152.pdfIn PDF document text
    • http://solidcommunication.ch/images/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • http://solidcommunication.ch/images/coin-master-free-500-spins-link_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
stream_003_off000047c3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47C3 23804 bytes
SHA-256: 74bb91689b45af7074e71b2755fdcea439c89f9f0f33bcccebc99bf51832043f
font_01_sfnt_off00007dac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAC 18048 bytes
SHA-256: 311fa6a3c8ed3152b86259a6f2b4fd65ad6ae6b737d77785fc3ef6c3d9292616

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