Malicious PDF — malware analysis report

Static analysis result for SHA-256 79ca5a1255077808…

MALICIOUS

PDF

56.1 KB Created: 2020-10-04 13:54:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: fc31b533c01fbc66147afd4fd1b47260 SHA-1: 9672d78b64285e422c3aa8abe7b265e1a2c89391 SHA-256: 79ca5a12550778088092db1c142ecd9283be97c5daaf8f108d99b0ede3db6074
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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/pify?keyword=don+imus+on+trump In PDF document text
    • https://site-1037211.mozfiles.com/files/1037211/38159521596.pdfIn PDF document text
    • https://site-1041404.mozfiles.com/files/1041404/36468508652.pdfIn PDF document text
    • https://site-1038532.mozfiles.com/files/1038532/31453344751.pdfIn PDF document text
    • https://site-1041768.mozfiles.com/files/1041768/55548086201.pdfIn PDF document text
    • http://dasoluf.baplink.com/uploads/1/3/0/8/130873738/kodebopijifevov-livalemutoliro-likopadobu.pdfIn PDF document text
    • http://files.darrencornell.com/uploads/1/3/1/3/131379729/2810533.pdfIn PDF document text
    • http://files.agile-dork.com/uploads/1/3/1/6/131637477/zoxiriginavop.pdfIn PDF document text
    • http://paxon.shannahraevocalstudio.com/uploads/1/3/1/1/131164269/b3d5709.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/a852e358-be83-4f7f-bdc9-8d3b4f3df556/rujexexukowebuzewamadu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47b99740-440f-4d94-9703-0e2daf08946b/86461763710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd480c22-6cc6-4b30-9056-ee80e89faf18/kefiwub.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_off0000a04a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA04A 4724 bytes
SHA-256: 57508f85c0fdacd50290c1067d06d43c1384cc3e363ab3a65fccbc7ef1a2b763
font_01_sfnt_off0000b049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB049 10432 bytes
SHA-256: 3cfe9009f4c88dc0895057d7e6815eaf8117f76fb8684c92863867c5a9463d09