Malicious PDF — malware analysis report

Static analysis result for SHA-256 e25e714f7b975e88…

MALICIOUS

PDF

79.3 KB Created: 2020-10-03 15:19:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9109d41399ea7bd9c8b1c41a0c7d34c5 SHA-1: 169a69641fa4c1d86f1cfd9b842e46707afd3401 SHA-256: e25e714f7b975e881778b4d8807395bb45643f149587968d93c45e8e513b805d
272 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a link farm hosted on disposable infrastructure. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics as a malicious redirector. The presence of a 'download button' lure and a 'password-protected archive' lure suggests the document is designed to trick the user into downloading and decrypting a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 8

  • 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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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
  • 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://ggtraff.ru/strik?keyword=adobe+livecycle+designer+torrent In PDF document text
    • http://zudix.yottaearthhome.com/uploads/1/3/2/6/132696398/0c36cab1ab8ec.pdfIn PDF document text
    • http://ziweraf.empowermentcoachforwomen.com/uploads/1/3/0/8/130814010/1c7b4d619ee933.pdfIn PDF document text
    • http://pegupukig.tskjesusfreak.com/uploads/1/3/1/6/131607095/jowufopikud_pamejavi_wuzel_rezadironuzus.pdfIn PDF document text
    • https://site-1038522.mozfiles.com/files/1038522/vowogexamug.pdfIn PDF document text
    • https://site-1036626.mozfiles.com/files/1036626/jesagebugasete.pdfIn PDF document text
    • https://site-1037164.mozfiles.com/files/1037164/taxoworadodukonorerazuwa.pdfIn PDF document text
    • https://site-1036767.mozfiles.com/files/1036767/wapasasodufipesidopu.pdfIn PDF document text
    • http://picfs.com/18a0ueadobeIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2920/8992/files/bonaire_evaporative_cooler_installation_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1855/0439/files/2422205524.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c63c80e-681a-4811-9f5a-9537afe8e7e0/lokokejena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/511a0868-5e80-40b3-9073-772c27eefab2/gigolemejetefediguwufaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bada274d-e3bd-435e-b6fe-199748bd835f/vujazuwixiwujixerakorajo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41fb47b2-0672-4b57-9b3c-e947186d66f7/82361781815.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44ad44c9-d3af-4549-9ac0-a86b4e941041/13682655649.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE4 5188 bytes
SHA-256: 46bb81268bfdd55173058d75d07ca09ec1e3438aa75daee1d5f6a72409ad7128
font_01_sfnt_off0000fca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA5 16744 bytes
SHA-256: 3428c588431a2ee59f134fdf827d57b48b57db81c808a7351991b04ad220935c