PDF malware analysis — malicious · 8d783a54cfd3b761

MALICIOUS

PDF

43.0 KB Created: 2021-05-13 00:30:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 673dea5fc7489efc04fdd28dc2e877f1 SHA-1: bd578c15bf764e2ae2ca09a2188b43f159c40f00 SHA-256: 8d783a54cfd3b761da1e8424dc34e112fd6425ef774fed69e889cab8b1c0ce6b

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are SEO-optimized for game cheats and free currency, indicating a link farm or phishing lure. The ML classifier strongly flagged this PDF as malicious, and the presence of a 'download button' heuristic further supports a malicious intent to trick users into clicking these links. The primary goal appears to be directing users to potentially malicious content or phishing pages.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

Heuristics 4

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.
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/moonactive-coin-master-free-spins-link-game-hack PDF link annotation
- https://www.wco.org.uk/uploads/files/files/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
- https://www.wco.org.uk/uploads/files/files/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
- https://www.wco.org.uk/uploads/files/files/minecraft-bedrock-free-download_GM479516143.pdfIn PDF document text
- https://www.wco.org.uk/uploads/files/files/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
- https://www.wco.org.uk/uploads/files/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
- https://www.wco.org.uk/uploads/files/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
- https://www.wco.org.uk/uploads/files/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
- https://www.wco.org.uk/uploads/files/files/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
- https://www.wco.org.uk/uploads/files/files/kachifpro_GM406889139.pdfIn PDF document text
- https://www.wco.org.uk/uploads/files/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
- https://www.wco.org.uk/uploads/files/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
- https://www.wco.org.uk/uploads/files/files/how-to-play-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
- https://www.wco.org.uk/uploads/files/files/coin-master-hack-tool-without-verification_GM406889139.pdfIn PDF document text
- https://www.wco.org.uk/uploads/files/files/coin-master-spin-link-free_GM406889139.pdfIn PDF document text
- https://www.wco.org.uk/uploads/files/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.wco.org.uk/uploads/files/files/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
- https://www.wco.org.uk/uploads/files/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
- https://www.wco.org.uk/uploads/files/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
- https://www.wco.org.uk/uploads/files/files/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
- https://www.wco.org.uk/uploads/files/files/coin-master-hack-online_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_003_off00004c4b.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4C4B	25032 bytes
SHA-256: `879fe79ec37dab60567cedea56e4cc632c5e20d984195b9f2013bcd656b45ca2`
`font_01_sfnt_off00008602.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8602	18168 bytes
SHA-256: `5140a57a6990af64b86c6fc328de463115c3f290c56e1373822c3feaa5dc4a97`

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