PDF malware analysis — malicious · f48691bb421f0bb8

MALICIOUS

PDF

41.9 KB Created: 2021-05-16 01:03:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16

MD5: 1ec405cd1aa3affaa95922bc6ea1a1dc SHA-1: ff0d2fd5337b42025bb38516d9fa155e2e246670 SHA-256: f48691bb421f0bb80f19aaa84e3ffe811c9125a66036c5dd603be2fa56177f82

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, identified as a link farm, directing users to external websites. The document body and extracted URLs suggest a lure related to game cheats and free items, likely to drive traffic to SEO spam pages or facilitate further malicious downloads. The ML classifier strongly indicated maliciousness.

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/479516143/how-to-make-a-free-server-in-minecraft-java-game-hack PDF link annotation
- https://schaefer-rechtsanwaelte.com/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
- https://schaefer-rechtsanwaelte.com/images/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
- https://schaefer-rechtsanwaelte.com/images/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
- https://schaefer-rechtsanwaelte.com/images/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
- https://schaefer-rechtsanwaelte.com/images/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
- https://schaefer-rechtsanwaelte.com/images/minecraft-esp_GM479516143.pdfIn PDF document text
- https://schaefer-rechtsanwaelte.com/images/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
- https://schaefer-rechtsanwaelte.com/images/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
- https://schaefer-rechtsanwaelte.com/images/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
- https://schaefer-rechtsanwaelte.com/images/no-verification-coin-master-hack_GM406889139.pdfIn PDF document text
- https://schaefer-rechtsanwaelte.com/images/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
- https://schaefer-rechtsanwaelte.com/images/coins-master_GM406889139.pdfIn PDF document text
- https://schaefer-rechtsanwaelte.com/images/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
- https://schaefer-rechtsanwaelte.com/images/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
- https://schaefer-rechtsanwaelte.com/images/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
- https://schaefer-rechtsanwaelte.com/images/getrobux-info_GM431946152.pdfIn PDF document text
- https://schaefer-rechtsanwaelte.com/images/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
- https://schaefer-rechtsanwaelte.com/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
- https://schaefer-rechtsanwaelte.com/images/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
- https://schaefer-rechtsanwaelte.com/images/how-to-get-minecraft-java-free_GM479516143.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_off00004ba3.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4BA3	23768 bytes
SHA-256: `d1fbf235b7b08f98ed1ac7002712fef0a2cf2a90ddeb26eb6def89ddb296c7da`
`font_01_sfnt_off00008178.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8178	18324 bytes
SHA-256: `d37ccdf2b735bf83da39a9c8e47095f79c8825f672a8e18203c6da1c4a675ee7`

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