PDF malware analysis — malicious · 0cab04eb41263f9a

MALICIOUS

PDF

42.7 KB Created: 2021-05-17 05:48:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27

MD5: c0d6663351cbc4957790104fec7c207a SHA-1: 111a5f6eba9c75f0501848e5a6b5095ab59a6d36 SHA-256: 0cab04eb41263f9a27858aa36f61930b66ef45f8f3fb2e1a3aec7a5abfdb59e4

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a malicious lure, specifically employing a link farm strategy to redirect users to external sites. The primary URL, https://netcdn.xyz/app/406889139/install-coin-master-game-hack, suggests an attempt to trick users into downloading a payload under the guise of game cheats. The ML classifier strongly supports the malicious nature of this PDF.

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/install-coin-master-game-hack PDF link annotation
- https://www.astrospace.com.tw/upload/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/hack-coin-master-using-pc_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/do-coin-master-hacks-work_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/coin-master-free-spins-link-ios_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/feb-23-2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/robux-free-online_GM431946152.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/where-to-get-free-robux_GM431946152.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text
- https://www.astrospace.com.tw/upload/files/coin-master-map_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_off00004c38.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4C38	25720 bytes
SHA-256: `83f8a7c0961c5553b7d0b610f410b88b9d943793d3d79e7ea603d973a1ce2e79`
`font_01_sfnt_off0000869f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x869F	17620 bytes
SHA-256: `bdd3f6fa08a68690a33effe7c91399080072412a80d1c2cf12d0a6868a7ffe9a`

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