Malicious PDF — malware analysis report

Static analysis result for SHA-256 205ce31619029ef6…

MALICIOUS

PDF

41.3 KB Created: 2020-10-04 07:41:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1d10cf1edafdbf666b6ff284a8cb0941 SHA-1: b2b1d4e4ae589c3aae6dd234fdd7eaca7e134305 SHA-256: 205ce31619029ef60e5e77f3a81a7551ebea0d8d4c824b7a261f628a226fc6ae
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://gettraff.ru/strik?keyword=beginning+statistics+pdf In PDF document text
    • https://site-1042666.mozfiles.com/files/1042666/pibexol.pdfIn PDF document text
    • https://site-1038782.mozfiles.com/files/1038782/rizij.pdfIn PDF document text
    • https://site-1036815.mozfiles.com/files/1036815/kilafajobi.pdfIn PDF document text
    • http://files.k9securityireland.com/uploads/1/3/0/7/130775321/sumebexuni-zunopulugunos-gimuxud-wevofenofasiz.pdfIn PDF document text
    • http://files.hollywood-resumes.com/uploads/1/3/1/4/131437312/f7a4d91.pdfIn PDF document text
    • http://janokoze.jewelnutritionist.com/uploads/1/3/1/3/131384771/64b75cec600206d.pdfIn PDF document text
    • http://nemimidu.spectrumoilfieldsupplies.com/uploads/1/3/1/3/131380183/nosiramivo.pdfIn PDF document text
    • http://files.rmshiles.com/uploads/1/3/1/0/131071167/9589709.pdfIn PDF document text
    • http://demul.forgecraftsteelfabricators.co.uk/uploads/1/3/1/4/131483152/natutipa.pdfIn PDF document text
    • http://zituloxuw.zthconsulting.com/uploads/1/3/2/7/132740837/pijafumowodo.pdfIn PDF document text
    • http://laxim.contactfreemarket.com/uploads/1/3/1/3/131398091/repotajidupewav_zovafojuw.pdfIn PDF document text
    • http://files.illustratebrandz.com/uploads/1/3/1/4/131437513/e82490c.pdfIn PDF document text
    • http://files.buggybarnmuseum.com/uploads/1/3/0/7/130739211/wememe-xukupol-jurikigababokan-gadowuri.pdfIn PDF document text
    • http://files.ultrasoundem.com/uploads/1/3/2/7/132710776/3267298.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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_off00005805.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5805 4924 bytes
SHA-256: 550a75591a96a638cf1a2448e00dcca10340d295675dd19b6712dc45dd0099e5
font_01_sfnt_off000068d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D8 9808 bytes
SHA-256: e90c85f9a0a364f0e236040d8afc6fe2f30f065ad0f3e3d42a3b4d2668319a37
font_02_sfnt_off00008a6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A6D 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333