Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4fd171078ece0fa…

MALICIOUS

PDF

42.4 KB Created: 2020-10-03 02:32:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: f8d4b3576ece60ab11ec9c228563e0e1 SHA-1: ea0acae6b03795606908796bb575d83412f772a3 SHA-256: c4fd171078ece0fa174c983670bf85c2665101f5b901d8f5cb5fbf5909f0dce5
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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/strik?keyword=rise+of+kingdoms+commander+pairing+guide In PDF document text
    • https://site-1037115.mozfiles.com/files/1037115/26337981492.pdfIn PDF document text
    • https://site-1036851.mozfiles.com/files/1036851/rigozimezerenokosaf.pdfIn PDF document text
    • https://site-1039375.mozfiles.com/files/1039375/98936669918.pdfIn PDF document text
    • https://site-1038357.mozfiles.com/files/1038357/90447925303.pdfIn PDF document text
    • http://files.ajdugger.net/uploads/1/3/1/0/131070146/7850251.pdfIn PDF document text
    • http://files.djcattrellauthor.com/uploads/1/3/1/3/131383297/papolelowi.pdfIn PDF document text
    • http://files.thesolidrockshop.com/uploads/1/3/0/8/130813797/zaxisufibuxuxigusi.pdfIn PDF document text
    • http://files.summertoremember.blog/uploads/1/3/0/9/130969357/5370697.pdfIn PDF document text
    • http://files.twillytie.com/uploads/1/3/2/6/132681698/7246694.pdfIn PDF document text
    • http://files.aeinstructional.com/uploads/1/3/0/7/130738814/vezisaf.pdfIn PDF document text
    • http://files.vanvolleyleague.ca/uploads/1/3/1/3/131398547/kikasawuxumitebatek.pdfIn PDF document text
    • https://raw.githubuserIn 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/24bbe2f7-51cd-4c3b-a432-5c735e073ea9/71194029474.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b770581-786d-4e34-ba8f-d20497e8a8ec/82524982484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/798766ad-5835-4883-877c-bca43de14591/14754397553.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_off00005822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5822 5516 bytes
SHA-256: 804cf676dcc236cf65a477473e9a0412ce859acd72d35fe152b797a73058ddb5
font_01_sfnt_off00006adc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ADC 15272 bytes
SHA-256: 52dfb66ac153ffbff9a7f5d975d56c8e407bf2184045690c8f7de7d1ca914716