Malicious PDF — malware analysis report

Static analysis result for SHA-256 45821487812e2b6f…

MALICIOUS

PDF

42.0 KB Created: 2021-05-17 22:08:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f7f5d1281f59135a686a5b84c712130a SHA-1: 6c213ed6cbf89998e0590686ca389cd7aad2472b SHA-256: 45821487812e2b6f0032fb20581a1fb3eefee33e68c10c5d6ad5f4f4ddbda458
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains lures for free Robux and game hacks, directing users to a known malicious redirector URL. The ML classifier also flagged this PDF as malicious. The presence of multiple links to potentially malicious PDF files hosted on westt.com.br further supports the malicious intent.

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/431946152/robloxhero.xyz-free-robux-game-hack In PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/oginject-co_GM406889139.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/coin-master-daily-free-link_GM406889139.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/minecraft-pocket-edition-free-ios_GM479516143.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/apps-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/free-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/coin-master-free-daily-rewards_GM406889139.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://westt.com.br/ckfinder/userfiles/files/coin-master-free-spins-hack-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_off000046a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46A5 25176 bytes
SHA-256: 6244eba6f6d27ef303ad04ed60ce1a09a340cb6523735e3358109dfe92144a30
font_01_sfnt_off000080c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80C2 18584 bytes
SHA-256: d96645d743d7bc7e16305d404e9ae036d13b2ec1544ce4a3e073a2af54c3cd1e

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