Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f4c27929c21fa9c…

MALICIOUS

PDF

66.5 KB Created: 2021-02-23 17:52:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: bc6f0c038219b71710b9983fe9c13163 SHA-1: 8791e13896909c26cdd8ef12914dbba176c46f6d SHA-256: 5f4c27929c21fa9c4ad3eb5433793c5093932c5208f5d49564a05437cfdb0275
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://yafferge.ru/wix?keyword=v+nails+erie+pa In PDF document text
    • http://euroshopmn.space/fobokobanadid28yp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462059/normal_5fed600cd85ee.pdfIn PDF document text
    • http://babysampler.com/3976365876qb8mo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419642/normal_601f710d157ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382423/normal_5ff96f78c72fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489730/normal_5feedf0198d5f.pdfIn PDF document text
    • http://justiciaforjustice.com/diabetes_care_ada_guidelines_2018r7ipt.pdfIn PDF document text
    • http://keto-menu.online/bakexawu5vq7q.pdfIn PDF document text
    • http://openlait.pro/crusaders_quest_genevie_guideaomuy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368781/normal_5fd7829a1a230.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380393/normal_6006015a14d32.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tugumeb/ear_piercing_pain_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dazutun/gazidelafovikogip.pdfIn PDF document text
    • https://s3.amazonaws.com/dowesitobuga/what_is_style_in_writing.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/telugu_calendar_2019_new_york.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/wunuteximakevudusi.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_off0000cac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC2 4776 bytes
SHA-256: 1668616cca62dace2a118395069f42eb23973f53924e9801ccfda377a3cfb18e
font_01_sfnt_off0000db11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB11 10088 bytes
SHA-256: 641a858e8b9adba4a2177b162c7daccc469c5e749f64424491b3d84c5691dc23