Malicious PDF — malware analysis report

Static analysis result for SHA-256 a43a2e06ba49b934…

MALICIOUS

PDF

44.3 KB Created: 2021-05-15 13:48:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4314ffa503085743579a35560ed0ab64 SHA-1: ac484ba1413128f9fd5692e3bee6add2101e55c6 SHA-256: a43a2e06ba49b934990e975531daf2a74c386349e1c724553fc1036da5f41c99
142 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which point to SEO-optimized PDF files related to game hacks and free in-game currency. The document body and heuristics indicate a fake CAPTCHA or human verification prompt is displayed, likely to trick users into clicking these links to download a malicious tool. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/406889139/coin-master-hack-tool-pc-game-hack PDF link annotation
    • http://cmfd.nl/images/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://cmfd.nl/images/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://cmfd.nl/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://cmfd.nl/images/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • http://cmfd.nl/images/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://cmfd.nl/images/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://cmfd.nl/images/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
    • http://cmfd.nl/images/download-coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://cmfd.nl/images/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://cmfd.nl/images/working-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://cmfd.nl/images/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://cmfd.nl/images/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://cmfd.nl/images/free-robux-master_GM431946152.pdfIn PDF document text
    • http://cmfd.nl/images/coin-master-app-hack_GM406889139.pdfIn PDF document text
    • http://cmfd.nl/images/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • http://cmfd.nl/images/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • http://cmfd.nl/images/coin-master-free-spins-and-coins-for-iphone_GM406889139.pdfIn PDF document text
    • http://cmfd.nl/images/free-free-robux_GM431946152.pdfIn PDF document text
    • http://cmfd.nl/images/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • http://cmfd.nl/images/is-minecraft-dungeons-free_GM479516143.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049e7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49E7 24900 bytes
SHA-256: 6d77caae5011ec92e82f02f5fca27e7dbc0a50996308a18c7c28b3a4433e1354
font_01_sfnt_off00008228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8228 2824 bytes
SHA-256: 381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
font_02_sfnt_off00008bca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BCA 17944 bytes
SHA-256: 870be5fa8cdab07c7616bfe00b6301e304862008d7cbda7089515cafcebcc899

Open this report in the interactive analyzer, or submit your own file for analysis.