PDF malware analysis — malicious · 1257463f7f72fba4

MALICIOUS

PDF

45.4 KB Created: 2021-05-14 13:33:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)

MD5: aedf6a1c5db585e973c181e85242df20 SHA-1: b07c07b1f57e90af59b8c453f64db408a769fe81 SHA-256: 1257463f7f72fba4e3253e0e73d6c99ebe6b5cf5b53cfa9af3bad2342aa69009

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many of which are presented as 'SEO link farms' and point to sites offering 'free robux' or 'coin master spins'. One prominent link, https://netcdn.xyz/app/431946152/free-vip-server-roblox-game-hack, suggests a lure for game-related exploits. The presence of a 'download button' heuristic further supports the malicious intent of directing users to external, potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9507

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/431946152/free-vip-server-roblox-game-hack
- https://www.andhrarealty.in/uploaded_files/userfiles/files/coin-master-free-spin-trick_GM406889139.pdf
- https://www.andhrarealty.in/uploaded_files/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdf
- https://www.andhrarealty.in/uploaded_files/userfiles/files/how-to-hack-any-roblox-account_GM431946152.pdf
- https://www.andhrarealty.in/uploaded_files/userfiles/files/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdf
- https://www.andhrarealty.in/uploaded_files/userfiles/files/free-robux-apk_GM431946152.pdf
- https://www.andhrarealty.in/uploaded_files/userfiles/files/free-spin-coin-master-apk_GM406889139.pdf
- https://www.andhrarealty.in/uploaded_files/userfiles/files/oprewards-free-robux_GM431946152.pdf
- https://www.andhrarealty.in/uploaded_files/userfiles/files/free-robux-with-no-verification_GM431946152.pdf
- https://www.andhrarealty.in/uploaded_files/userfiles/files/free-robux-without-doing-anything_GM431946152.pdf
- https://www.andhrarealty.in/uploaded_files/userfiles/files/free-spins-on-coin-master-iphone_GM406889139.pdf
- https://www.andhrarealty.in/uploaded_files/userfiles/files/reddit-coin-master-free-spins_GM406889139.pdf
- https://www.andhrarealty.in/uploaded_files/userfiles/files/coin-and-spin_GM406889139.pdf
- https://www.andhrarealty.in/uploaded_files/userfiles/files/coin-master-free-cards-hack_GM406889139.pdf
- https://www.andhrarealty.in/uploaded_files/userfiles/files/minecraft-hacks-wurst_GM479516143.pdf
- https://www.andhrarealty.in/uploaded_files/userfiles/files/toolbox-premium-apk_GM479516143.pdf
- https://www.andhrarealty.in/uploaded_files/userfiles/files/free-robux-games-that-actually-work-2021_GM431946152.pdf
- https://www.andhrarealty.in/uploaded_files/userfiles/files/real-free-robux-generator_GM431946152.pdf
- https://www.andhrarealty.in/uploaded_files/userfiles/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdf
- https://www.andhrarealty.in/uploaded_files/userfiles/files/roblox-free-skin_GM431946152.pdf
- https://www.andhrarealty.in/uploaded_files/userfiles/files/roblox-cheat_GM431946152.pdf
- http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_003_off00004c2a.bin` `031e03603c65f7648d052bace9fd36a569ff6418d74d48842ea82c7fb9a2cf49`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4C2A	24472 bytes
`font_01_sfnt_off00008459.bin` `db1860fd79a3f2cbe32e2bada3ba4c68a2d581b7a24294387cd777233cc9cef6`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8459	2828 bytes
`font_02_sfnt_off00008e10.bin` `c1771e38e47f70d4d1a65a36e251d19cfd5d8120c02d48444b4cec837a0f1c39`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8E10	18492 bytes

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