PDF malware analysis — malicious · 4c01b4be1a9d53c1

MALICIOUS

PDF

34.9 KB Created: 2021-06-20 09:12:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22

MD5: 77b8273be4c10fd03e6d2d4882249f76 SHA-1: e2c7105eda3e9fac77b9b36f5840f0dc74596e2e SHA-256: 4c01b4be1a9d53c10042d382cf5b3e36c3ad229088de3e497f7c9a3a24ab58cc

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-to-use-cheat-engine-6.7-in-roblox-game-hack PDF link annotation
- http://collectionsuncovered.com/media/storage/editor/files/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/free-spin-coin-master-today_GM406889139.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/archery-master-3d-unlimited-coins-hack_GM406889139.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/roblox-hack-bee-swarm-simulator_GM431946152.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/rare-free-links-to-coin-master_GM406889139.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/roblox-hack-download_GM431946152.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/minecraft-mod-menu-apk_GM479516143.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/hack-para-murder-mistery-2-2021-roblox_GM431946152.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/coin-master-free_GM406889139.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/free-robux-generator-2021-robux-hack-no-survey_GM431946152.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/roblox-hack-client_GM431946152.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/how-to-change-your-name-in-roblox-for-free_GM431946152.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/xydia-roblox-hack_GM431946152.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/coin-master-2021-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
- http://collectionsuncovered.com/media/storage/editor/files/free-minecraft-capes_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
`font_00_sfnt_off00002f50.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2F50	22800 bytes
SHA-256: `096e0424ff1f315136b8dfc197a76be6e1d97eececce7be5e5051b55c3c7292d`
`font_01_sfnt_off0000625d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x625D	19332 bytes
SHA-256: `a737216621889618a72d4bbb1bc67e6abe829d39be67a4c3dd169de9e922364a`

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