Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce5f6b63589a72c9…

MALICIOUS

PDF

68.5 KB Created: 2021-02-20 14:50:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b4cd435adf9c5b8b3590e9aed416cf53 SHA-1: 508ba8afa27909eb89ac7854c1a6389985b30aa2 SHA-256: ce5f6b63589a72c93a38585c25b066d35cd72f471d2fe5958b1ad53f7f840811
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/wix?keyword=oculus+rift+request+timed+out In PDF document text
    • https://fafiwopadatomag.weebly.com/uploads/1/3/5/3/135326984/pevufasejixuju_minaterevaj_wajaga_safeb.pdfIn PDF document text
    • https://xesukalo.weebly.com/uploads/1/3/5/3/135311970/zexugozimepo_xetofubafa_mopopepox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390999/normal_5fe47027e27cb.pdfIn PDF document text
    • https://verumoxozuvije.weebly.com/uploads/1/3/1/4/131407377/sivuj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450351/normal_5fcbfd58dfcf9.pdfIn PDF document text
    • https://siroxaje.weebly.com/uploads/1/3/4/0/134000026/dovodiwukis-pedudepejasebag-fumuto-vasozarozesom.pdfIn PDF document text
    • https://cdn.sqhk.co/jabakujivim/hdjficL/drum_pad_practice.pdfIn PDF document text
    • http://mowewuwopirot.iblogger.org/kuxepaxof.pdfIn PDF document text
    • https://fozapiko.weebly.com/uploads/1/3/0/9/130968993/a45f37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454281/normal_600fb887dfec0.pdfIn PDF document text
    • https://xawizavikerid.weebly.com/uploads/1/3/4/5/134525990/zanabikoxe-xapukukepavama-fosifeni-femixamimege.pdfIn PDF document text
    • https://bolamowoxuwev.weebly.com/uploads/1/3/3/9/133997192/af67ab2ac6.pdfIn PDF document text
    • http://ludugomawetus.22web.org/avast_virus_definition_update_file_free_s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://forozilixoder.rf.gd/coreldraw_x6_full_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/56989151250.pdfIn PDF document text
    • http://guwajip.epizy.com/frindle_book_online.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/nonofinisufuxululikuvolit.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_off0000cf6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF6B 5112 bytes
SHA-256: d9795c439eaca45742308b107008b3438f103fc7084e5033cfa598068ffbe5cb
font_01_sfnt_off0000e0b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B5 10680 bytes
SHA-256: 3e888c1f112b790b4c666a439bb337a3ddea1bd891e36e02756c1279d71d3507