Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c5fa24d90386518…

MALICIOUS

PDF

82.9 KB Created: 2021-02-20 18:06:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 32f4cf125f9a341733a8f2dd22742db1 SHA-1: 253386f762da1972434e8792fa0e6a13e4a7da65 SHA-256: 0c5fa24d9038651862139dff70b144f5a9bdf4995a2e2af12a05ebdc06a72234
192 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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/wb?keyword=fifty%20shades%20freed%20movie%20duration In PDF document text
    • https://cdn-cms.f-static.net/uploads/4473359/normal_60276ea3445a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421615/normal_5fe6cd5048c3d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472776/normal_5feb6412a3f8f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420244/normal_6008a829b7cc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479705/normal_601ab74442fb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367621/normal_5fd95d5d0f1ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_600a87b64d70f.pdfIn PDF document text
    • http://nikaold.site/27248806286y6pe4.pdfIn PDF document text
    • https://kuduxuke.weebly.com/uploads/1/3/5/3/135323303/vunijagegil-xefizeregaz-sumafisifipoj.pdfIn PDF document text
    • http://copyrightram.net/sonekivakorusavae9jel.pdfIn PDF document text
    • https://zetaxufonepijak.weebly.com/uploads/1/3/4/3/134353616/bokegikuzem.pdfIn PDF document text
    • https://delovamubikener.weebly.com/uploads/1/3/4/7/134707073/lupovete.pdfIn PDF document text
    • http://matrixbicycles.com/noginujalaf64i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501998/normal_5fd8564be4ce8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389792/normal_5fcbe4515cf77.pdfIn PDF document text
    • https://pufukowog.weebly.com/uploads/1/3/4/5/134583281/251c54.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rexuxos.rf.gd/26970659156.pdfIn PDF document text
    • http://zamudijofo.epizy.com/kavilefepifonomaxi.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_off0001031a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031A 5232 bytes
SHA-256: 62fa001966958a30254bf58a087801ff85bd804ba4c34e4ac79f61124dbf14a1
font_01_sfnt_off000114d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114D4 12392 bytes
SHA-256: 2e82895780b191f3433d978742003d9458e2395ffb7d12d3d03619f3d4e9ec90