Malicious PDF — malware analysis report

Static analysis result for SHA-256 810eec7a80561cd6…

MALICIOUS

PDF

72.4 KB Created: 2020-11-10 05:50:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: beca354596a4110061d11d06504117db SHA-1: 987499a59aa384de0213a4f50569fdafdbd4a756 SHA-256: 810eec7a80561cd61f6a89efff8c307ee3d6748afd1cdc6c7f7fe3dc957ed1de
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a clipboard command execution lure, indicating the document instructs users to copy and paste content into a shell. It also links to known malicious redirector infrastructure. The presence of these elements suggests an attempt to trick the user into executing commands, likely to download and run a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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
  • 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://cctraff.ru/123?keyword=nes+emulator+online+play In PDF document text
    • https://cdn-cms.f-static.net/uploads/4373504/normal_5f8d7e696794d.pdfIn PDF document text
    • https://rofuvawe.weebly.com/uploads/1/3/4/3/134363923/vigesafijoz_mobuledejuxig.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/89c232b487.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390681/normal_5f991e054452e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6131809c-b207-4ab5-a660-3894af55bf3d/26156310100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2c0d8cf-b83b-4cd4-bb76-bc100590ff95/naforudazobatipusuzifone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c3ea2b4-8ebc-4a82-a956-b28236d687c7/73000996494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e89dfa9-75e2-4023-8eee-116984b640a3/chemistry_atoms_first_burdge_2nd_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fae4112-f998-4b52-b9a4-503d48395e3b/muneridujizeketiwet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1db2b244-7458-46c2-a295-d45251b8aabc/34032787586.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29b26712-57e6-44e4-a166-9873e18cad73/45701528240.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64a05c81-f031-4e51-bf5b-7001436bd584/jibematamadifasesuwivixu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E7 3224 bytes
SHA-256: fc6c41ebb9fc4ade3bacc4cc01ae8d7cef81b7a3e14f2fbf28aa5fb39017f2c4
font_01_sfnt_off0000df70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF70 5036 bytes
SHA-256: c7198b3820f2270eeccab6d40e1ec50c6b191de7fe5fcc24eeb4d726d1aa781f
font_02_sfnt_off0000f083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF083 10656 bytes
SHA-256: 5d0978025cd791feabd0b5291d38c97572b689507564a9595307c42f08ec825e

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