PDF malware analysis — malicious · be61138f439026bb

MALICIOUS

PDF

49.3 KB Created: 2021-06-03 14:54:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17

MD5: 711ece4330f392760167ecde60002119 SHA-1: 1d3b7533e696e8c6a7f4efda6d27e57e0d38a02c SHA-256: be61138f439026bb1eeb3ae0ca1104ffaaa104bc08bd61eba5fb8d6dedabb5ff

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, many of which are structured as SEO-optimized slugs. The primary URL points to a page about 'how to earn free stars on Coin Master game hack', suggesting a lure for game-related cheats or scams. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

Nyx PDF Classifier malicious score 0.9796

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.online/app/406889139/how-to-earn-free-stars-on-coin-master-game-hack PDF link annotation
- https://www.jcn.co.uk/uploads/files/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/robux-website_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/tiktok-free-view-pro-app-download_GM835599320.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/minecraft-building-hacks_GM479516143.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/roblox-hack-game_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
- https://www.jcn.co.uk/uploads/files/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off000051e2.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x51E2	30460 bytes
SHA-256: `0718c8c1ac13869d4fb038521cce43311fa5f4d66d53c237defa1fc4ec42a708`
`font_01_sfnt_off0000956d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x956D	2880 bytes
SHA-256: `10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132`
`font_02_sfnt_off00009f57.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9F57	17872 bytes
SHA-256: `0709ca684ad5453d4a1c2d42e2fc6702b99f6275411c4f1e468931145e99bc4e`

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