PDF malware analysis — malicious · 49b781e10726ead1

MALICIOUS

PDF

43.3 KB Created: 2020-11-09 17:03:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 40fc6ce5c1af9f62515bbef7291e403d SHA-1: 97134a62fc47477dc1b1461e60dbcd1929d1aad8 SHA-256: 49b781e10726ead107a4f18db5237be5a191a5adf591a077c8e5e4ec7222d0ec

76 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains an embedded URL and heuristics indicate it's designed to trick users into executing commands. Specifically, the 'SE_CLIPBOARD_COMMAND_LURE' heuristic suggests the document instructs the user to copy and paste content into a shell, which is a common technique for executing malicious code. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE

Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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://trafficel.ru/123?keyword=the+lion+king+little+golden+book+pdf
- https://cdn-cms.f-static.net/uploads/4445742/normal_5f9d93a888237.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://uploads.strikinglycdn.com/files/eecd6ecc-4be4-4e20-9477-92d0e9cc1576/wigakunos.pdf
- https://s3.amazonaws.com/kibavutibeved/mega_block_castle_instructions.pdf
- https://uploads.strikinglycdn.com/files/142db4d9-5ac8-43ca-87ad-8577ccc9264f/download_shareit_apk_for_android.pdf
- https://uploads.strikinglycdn.com/files/5814db4a-bdc4-48b1-92f8-da956c306b44/2407282501.pdf
- https://uploads.strikinglycdn.com/files/239845d1-71fa-40e3-8057-ea2ff08391ae/gopabelivibasene.pdf
- https://uploads.strikinglycdn.com/files/38138456-2dfb-424c-a25d-632ce7ad50e6/the_beatles_complete_scores_box_edition.pdf
- https://uploads.strikinglycdn.com/files/de0614e3-2566-45ed-93db-d4d77ef4d7e5/bass_pro_return_policy_on_rods.pdf
- https://s3.amazonaws.com/matogapibelifiv/luliwijenosugijawe.pdf
- https://uploads.strikinglycdn.com/files/fd856f26-90f4-4b3f-b9c3-7c6fb8d68d7f/runuxutitobawolibawojagan.pdf
- https://s3.amazonaws.com/mijedusovineti/41588465939.pdf
- https://s3.amazonaws.com/xalexojaxipud/ds203_oscilloscope_manual.pdf
- https://uploads.strikinglycdn.com/files/09296d01-1769-4f75-8f57-f403b6f60005/48552062303.pdf
- https://uploads.strikinglycdn.com/files/f57aa1fc-8d52-44a0-b66a-4991d7bdb3e3/osake_riesz_guide.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00006acd.bin` `343a44338750fc194b5de2902182080081d77690e8021b0db7730515d66a23a8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x6ACD	4972 bytes
`font_01_sfnt_off00007bb8.bin` `7df0ecd254b1de52fe6177d7f3c26e5587a2b157b82490c508b1ef1f5d793e5d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7BB8	10840 bytes

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