PDF malware analysis — malicious · 6aa38f7fc899492d

MALICIOUS

PDF

44.6 KB Created: 2021-06-03 04:11:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15

MD5: e442dd8e7fddff765bb09742790dcd5f SHA-1: e5fa29862bb9a03fb6e4d57ffd1d5fcdca01d054 SHA-256: 6aa38f7fc899492d3818177747941a7d46ce312e8a3c6a7eaadeb29a18773837

142 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

This PDF document employs a lure to trick users into downloading malicious content, evidenced by numerous embedded links to external PDF files and a primary URL associated with game hacks. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document likely instructs users to copy and paste content into a command-line interface, potentially to execute downloaded payloads. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9865

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.
Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE

Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
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.online/app/479516143/minecraft-education-edition-free-download-game-hack PDF link annotation
- https://silvterie.com.br/images/ckfinder/files/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/mcpe-hacks_GM479516143.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/robux-boost_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/robux-generator-no-verification-needed_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/coin-master-hack-2021-no-survey_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/free-limiteds-roblox_GM431946152.pdfIn PDF document text
- https://silvterie.com.br/images/ckfinder/files/coin-master-free-link-facebook_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.

Filename	Kind	Source	Size
`stream_004_off000052ee.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x52EE	24896 bytes
SHA-256: `554b89b51f0490f19e540ddb84ca61ab31b404d5278a4745430a7f33bd6f0292`
`font_01_sfnt_off00008b64.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8B64	18428 bytes
SHA-256: `3a678da037c633a6a13339b3c5a4bd8322cea022da4d3ccfe017faaa6041de20`

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