PDF malware analysis — malicious · 96ed49e41be05889

MALICIOUS

PDF

56.9 KB Created: 2021-06-03 06:02:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15

MD5: 0367644b938dd4a5e506dda0a1871496 SHA-1: 02e10686d7eaf5878cb18023c7b809ac4162eb70 SHA-256: 96ed49e41be0588933fa238eaff084ae7c27fcb49a7688773fd2cc258d29ce94

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 SEO-optimized and point to gaming-related lures like 'Coin Master' and 'Roblox'. The heuristic PDF_SEO_LINK_FARM indicates a link farm, and the ML classifier strongly suggests maliciousness. The embedded URL and the document body suggest a lure to click on these links, likely to download further malicious content or phish for credentials.

Machine Learning

Nyx PDF Classifier malicious score 0.9680

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/coin-master-free-gift-link-2021-game-hack PDF link annotation
- https://www.metal.hr/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
- https://www.metal.hr/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.metal.hr/files/today-coin-master-free-coins-link_GM406889139.pdfIn PDF document text
- https://www.metal.hr/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
- https://www.metal.hr/files/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
- https://www.metal.hr/files/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
- https://www.metal.hr/files/coin-master-hack-co_GM406889139.pdfIn PDF document text
- https://www.metal.hr/files/coin-master-daily-free-coins-link_GM406889139.pdfIn PDF document text
- https://www.metal.hr/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
- https://www.metal.hr/files/roblox-games-free_GM431946152.pdfIn PDF document text
- https://www.metal.hr/files/are-there-any-coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
- https://www.metal.hr/files/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
- https://www.metal.hr/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
- https://www.metal.hr/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
- https://www.metal.hr/files/www-free-robux-com_GM431946152.pdfIn PDF document text
- https://www.metal.hr/files/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
- https://www.metal.hr/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
- https://www.metal.hr/files/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
- https://www.metal.hr/files/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
- https://www.metal.hr/files/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
- http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off00004f57.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4F57	26932 bytes
SHA-256: `afcd812898cc497177ad7bdd60e8a6b063820d9ee046c2290f98f002009804a5`
`font_01_sfnt_off00008d79.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x8D79	3624 bytes
SHA-256: `31d949246f0413ad5f056e7f95336c219403c8dc3412aa27950f94c93a53d01e`
`font_02_sfnt_off00009a14.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x9A14	7960 bytes
SHA-256: `cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2`
`font_03_sfnt_off0000ad39.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xAD39	18284 bytes
SHA-256: `00f588a17a5ec62cfb33c50734468f0ac7c021c7f981e3ddf1024eb2998eadd5`
`font_04_sfnt_off0000cf50.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCF50	4272 bytes
SHA-256: `fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0`

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