PDF malware analysis — malicious · 58bf85d8686a95b1

MALICIOUS

PDF

42.4 KB Created: 2021-05-15 07:13:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: 3bc44f9259f4d653fa7b16fa1f544c36 SHA-1: ff6f01dc71323877effa1302853442ff00172153 SHA-256: 58bf85d8686a95b1dbf859c98bf2434e73dafd3bb2d3783311539abf9eac4abb

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are structured as a link farm pointing to SEO-optimized PDF files. The document body, though truncated, contains a URL that appears to be a lure for hacking a game. The presence of numerous external links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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/how-to-hack-coin-master-ios-jailbreak-game-hack
- http://centr-expert.su/images/how-to-get-free-cards-in-coin-master_GM406889139.pdf
- http://centr-expert.su/images/gameoffice-net-hack-coin-master_GM406889139.pdf
- http://centr-expert.su/images/ww-roblox-come_GM431946152.pdf
- http://centr-expert.su/images/coin-master-online-hack-tool_GM406889139.pdf
- http://centr-expert.su/images/free-spins-on-coin-master_GM406889139.pdf
- http://centr-expert.su/images/100-free-spins-coin-master_GM406889139.pdf
- http://centr-expert.su/images/coin-master-ios-gods-hack_GM406889139.pdf
- http://centr-expert.su/images/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdf
- http://centr-expert.su/images/free-cheat-codes-for-coin-master_GM406889139.pdf
- http://centr-expert.su/images/coin-master-hackcom-xyz_GM406889139.pdf
- http://centr-expert.su/images/free-robux-generator-no-survey_GM431946152.pdf
- http://centr-expert.su/images/roblox-robux-generator-no-human-verification_GM431946152.pdf
- http://centr-expert.su/images/free-ways-to-get-robux_GM431946152.pdf
- http://centr-expert.su/images/coin-master-free-spin-and-coin_GM406889139.pdf
- http://centr-expert.su/images/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdf
- http://centr-expert.su/images/free-minecraft-codes-2021_GM479516143.pdf
- http://centr-expert.su/images/coin-master-daily-free-spin-app_GM406889139.pdf
- http://centr-expert.su/images/free-robux-script_GM431946152.pdf
- http://centr-expert.su/images/microsoft-roblox-rewards_GM431946152.pdf
- http://centr-expert.su/images/coin-master-hack-no-verification-2021_GM406889139.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off000049f3.bin` `2e628a3fea1031f4227bcea90b8a7a5f91d04039216c171a1fd1d7ef8e8ae778`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x49F3	25416 bytes
`font_01_sfnt_off00008347.bin` `696217ece26025caf6b49e3e2a1a7998402a438fab3f8ae4039d829799c9dc6e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8347	18280 bytes

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