Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5f4f92f1fc564c5…

MALICIOUS

PDF

79.1 KB Created: 2021-02-24 14:54:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 564078be406c79bb31107797dd724bc6 SHA-1: 8e72302ff4260ae0f0022e757b3dc2aff2e55870 SHA-256: f5f4f92f1fc564c5656404b0a435144dbfe4193d2223df2dd62516c31051076f
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://crophysi.ru/award?keyword=brand+identity+design+pricing In PDF document text
    • https://cdn.sqhk.co/putuziboki/hhddqb3/go_long_meaning_in_football.pdfIn PDF document text
    • http://plsale.pro/layoff_notice_california_templatekmsmj.pdfIn PDF document text
    • http://lightstart.xyz/demiwetipafozebopewi2v4zm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405651/normal_5fecba254bd23.pdfIn PDF document text
    • http://dashcamtopbest.com/what_is_the_highest_richter_scale97bhn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_60304693b9511.pdfIn PDF document text
    • https://cdn.sqhk.co/wowebajix/if7hbg1/20826154925.pdfIn PDF document text
    • http://appletopshop.ru/sonar_bangla_bengali_font_software_freefisld.pdfIn PDF document text
    • https://cdn.sqhk.co/godajaxox/iatHigf/vogojelepamatine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368492/normal_5fe610a8c8e7e.pdfIn PDF document text
    • https://cdn.sqhk.co/xunalafugapa/qp3gcih/mitinij.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/GKAghid/79491117031.pdfIn PDF document text
    • http://jirekakeduvinij.22web.org/68649232599.pdfIn PDF document text
    • https://cdn.sqhk.co/sopiloroda/jdgdhjG/jemobo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403805/normal_5ff580395989f.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/eJpjgij/30862247289.pdfIn PDF document text
    • http://blognews.top/expanded_form_printable_worksheetiw75j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://maxuzenikofi.epizy.com/copd_treatment_guidelines_uptodate.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_off0000f9c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C3 5360 bytes
SHA-256: f55f1e0f784671b3a4c994dad7dc28faccef145b88b128e6ba97645b8e9604b5
font_01_sfnt_off00010c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1B 10380 bytes
SHA-256: 771dd94f6426e3c85966e618363764d705a274db46311b462498016202c83d35