Malicious PDF — malware analysis report

Static analysis result for SHA-256 622ef8436c00f9a9…

MALICIOUS

PDF

72.8 KB Created: 2021-02-08 22:43:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 5bd9b7125731f1828f40621be5992050 SHA-1: eb8c7c2ffcb1a655e7b7082ba46e3be7347cfb5b SHA-256: 622ef8436c00f9a9328d6bd2f09d600bf02c9b498799951ab5da7f6087ca7323
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://leonvi.ru/aws?utm_term=father%2527+s+day+gift+guide+blog PDF link annotation
    • https://cdn.sqhk.co/zatejurix/3hhtrce/67324314657.pdfIn PDF document text
    • https://cdn.sqhk.co/sejejajoxej/icghhig/70s_80s_90s_music_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mikevoponage/KWgfgiF/dark_theme_for_oneplus_7t.pdfIn PDF document text
    • https://fetevemukimagon.weebly.com/uploads/1/3/4/8/134896640/gufuxedibonex-juwazezo-wilelasutate-butolofa.pdfIn PDF document text
    • https://jevezorubik.weebly.com/uploads/1/3/4/8/134864628/sowigixupiraku_sakatajikoxapi.pdfIn PDF document text
    • http://sefexetewizu.iblogger.org/98527914377.pdfIn PDF document text
    • https://dupifexuxesopap.weebly.com/uploads/1/3/5/3/135348138/7701d.pdfIn PDF document text
    • https://cdn.sqhk.co/gixejefi/yQijjeK/lejatagegotin.pdfIn PDF document text
    • https://cdn.sqhk.co/kusamika/gyv5ZTq/20686576662.pdfIn PDF document text
    • https://cdn.sqhk.co/rigepasemapa/EhdIgj7/cruise_deals_december_2020.pdfIn PDF document text
    • https://losebevaxefot.weebly.com/uploads/1/3/5/3/135347065/6056614.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/nagudo/best_regards_in_french_informal.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/postnatal_assessment_procedure.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/alabama_college_football_injury_report.pdfIn PDF document text
    • http://faxanudof.epizy.com/nunadowiremajuk.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_off0000de1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1F 5400 bytes
SHA-256: a22d0a8fc0fd787659f7d4a2c65216c34547255c2125d882ae4fe044243f54a3
font_01_sfnt_off0000f088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF088 11148 bytes
SHA-256: b459f2b1bce57cd880c61caafe539c11f15e2753b217c1d3dcc8093eaa5ebb1e