Malicious PDF — malware analysis report

Static analysis result for SHA-256 c58da8e0bd17298d…

MALICIOUS

PDF

39.7 KB Created: 2020-10-07 06:53:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e9b2cb17f00d2a1903211cb7279b983e SHA-1: f26fe7d2c132712880afc64b15722347b27e480a SHA-256: c58da8e0bd17298d48488a7de6e28feb1ac3671f5e449bb3ec006572b48844f6
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=euridice+anouilh+pdf In PDF document text
    • http://zakelidi.bcchildandyouthincareweek.com/uploads/1/3/0/7/130738918/ae547f646.pdfIn PDF document text
    • http://momot.vividconnections.co.uk/uploads/1/3/1/4/131413603/aa865c3f9.pdfIn PDF document text
    • http://files.martinspitznagel.com/uploads/1/3/1/3/131379567/rogitol.pdfIn PDF document text
    • http://nuwem.passafling.com/uploads/1/3/2/8/132815076/8990137.pdfIn PDF document text
    • https://site-1036659.mozfiles.com/files/1036659/41997567233.pdfIn PDF document text
    • https://site-1038595.mozfiles.com/files/1038595/kaguzi.pdfIn PDF document text
    • https://site-1040164.mozfiles.com/files/1040164/97601942358.pdfIn PDF document text
    • https://site-1037088.mozfiles.com/files/1037088/62035596208.pdfIn PDF document text
    • https://site-1042666.mozfiles.com/files/1042666/gijonoselanatuko.pdfIn PDF document text
    • https://site-1038872.mozfiles.com/files/1038872/86615054589.pdfIn PDF document text
    • https://site-1039636.mozfiles.com/files/1039636/lasizegumetevo.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/dcaba72d-d2f2-46a1-9cc9-72ef0f18765f/93265563243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/620e98f3-417c-4451-979f-56ee72ba6199/foguxevonuludixas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d72e9f9-811c-4d50-83d6-70f929fe9455/rafekexiwefewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d19dd212-7d08-4aa7-ab22-c5fd8d99aac0/wajununogiraxo.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_off00005eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAF 5024 bytes
SHA-256: 375a5ae2c8dacba620b5c106a69ef1d300699e6554ea3b4895959fe0d83a83ab
font_01_sfnt_off00006fbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FBF 10216 bytes
SHA-256: 8c680876936a30223dfefdca2aecc6ef9091902cba51653d62663c14fd2f0378

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