Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8989434578de94a…

MALICIOUS

PDF

51.1 KB Created: 2020-10-07 12:11:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1ebf1e64243f25eee8cbd2686a9972e6 SHA-1: eaa7482f415b900381ef33bfc5c0623d89918615 SHA-256: c8989434578de94a8145a416ff3eafe611a7f08afc64a84743e66459f094dca7
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://ttraff.link/pify?keyword=silica+gel+polar+solubility In PDF document text
    • http://files.westerncoloradosoilhealth.org/uploads/1/3/0/7/130775130/3938298.pdfIn PDF document text
    • http://files.theimmigrationforce.com/uploads/1/3/0/7/130776503/xawawirirotis-niboz-sodadijetilad.pdfIn PDF document text
    • http://luwixul.iplumb-iheat.co.uk/uploads/1/3/1/4/131407588/nunisafe_xupikes_zanajon.pdfIn PDF document text
    • http://kiguj.locoteam.com/uploads/1/3/1/3/131380429/1453585.pdfIn PDF document text
    • https://site-1038909.mozfiles.com/files/1038909/xotolanepafovujalatujixin.pdfIn PDF document text
    • https://site-1044309.mozfiles.com/files/1044309/20281762585.pdfIn PDF document text
    • http://files.portfolioinmotion.com/uploads/1/3/0/7/130775583/1845377.pdfIn PDF document text
    • http://vatepuz.romafrosthart.com/uploads/1/3/2/6/132695517/sezexo.pdfIn PDF document text
    • http://files.helpbuildit.net/uploads/1/3/2/6/132695741/govedopogel_kujavadutuxa.pdfIn PDF document text
    • http://vesopo.matoacaindians.com/uploads/1/3/1/8/131859527/sikoge.pdfIn PDF document text
    • http://files.upshotsolutionsllc.com/uploads/1/3/1/3/131380546/5619236.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/6382d760-dd03-4758-8234-3fecda4ebf46/62924072658.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_off00008977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8977 5444 bytes
SHA-256: 65c3ee10badcdc0448ba38d11c09d898ee0bf8842c9183d4e2afed4913787c95
font_01_sfnt_off00009c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C10 10360 bytes
SHA-256: 6f0dc043ac4571e5064d1797312d572373b0781dac8851b504521b2675713289