Malicious PDF — malware analysis report

Static analysis result for SHA-256 f08a56cb64b267e4…

MALICIOUS

PDF

38.8 KB Created: 2020-10-03 14:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 2943eeaf42c35ac869664e0ab980722f SHA-1: 504093a3aaa862a39c32be36bb5d8c4117827a27 SHA-256: f08a56cb64b267e4231dc7aa3c66be7662dff045765ac6ca58d40480817f1de0
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=new+order+leave+me+alone In PDF document text
    • http://files.warrenkaplan.com/uploads/1/3/1/0/131070336/326502.pdfIn PDF document text
    • http://jigude.jerryandwen.com/uploads/1/3/1/0/131069991/9697319.pdfIn PDF document text
    • http://niduboxu.thebarnatheritagefarm.com/uploads/1/3/0/9/130969742/2dea58f2c45cc.pdfIn PDF document text
    • https://site-1036754.mozfiles.com/files/1036754/xesip.pdfIn PDF document text
    • http://files.7westproductions.com/uploads/1/3/1/3/131380616/6818143.pdfIn PDF document text
    • http://files.fawkhamridingclub.com/uploads/1/3/0/7/130739833/kobajutire_wijokolaw_bitavibazu_napupomevorove.pdfIn PDF document text
    • http://files.simplyyogameditation.com/uploads/1/3/1/1/131164185/5732642.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/4973c0ed-ea4d-4714-a424-aa89e6387b79/61437664469.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5c82da3-be10-40a3-9566-338ad7ef3651/bosubimejun.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_off00005b83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B83 4912 bytes
SHA-256: 128b7438235bd70f15ccf7c2e5c04c3e370764ddd24ba3a2b1688bbc81b2a607
font_01_sfnt_off00006c39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C39 10088 bytes
SHA-256: 1c63518b62ac03e9ffe623041f70c12711ed31d21864505aa844d5bcc37c6133