Malicious PDF — malware analysis report

Static analysis result for SHA-256 22cdcdf3906a257a…

MALICIOUS

PDF

64.0 KB Created: 2021-02-11 18:17:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 790ab2759c8f3067a3590a5e2d7abea5 SHA-1: 56dddd2ef3d7ef78c8c795c94c6ae3bb73852e1b SHA-256: 22cdcdf3906a257ae4e3b2c70cf8b40262ed1ad9bb018538b9a15921c70550c2
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/wb?keyword=thermo%20barnstead%20nanopure%20manual In PDF document text
    • http://gigazukiwizave.22web.org/beijing_normal_university_application_form.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/JjiG0nJ/bipididunazidaxapirorirup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_60236b78d7392.pdfIn PDF document text
    • https://putomusozozor.weebly.com/uploads/1/3/4/3/134321488/tawunadire_gadexifi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489247/normal_5fd7875ec3944.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503525/normal_5ff461cd1d535.pdfIn PDF document text
    • https://cdn.sqhk.co/dedejosewor/uhRhchi/bufavitemisilukuvaniloli.pdfIn PDF document text
    • https://beluxavin.weebly.com/uploads/1/3/4/5/134507718/00d7203762.pdfIn PDF document text
    • https://bajiwemijowulu.weebly.com/uploads/1/3/5/9/135990815/971174.pdfIn PDF document text
    • https://cdn.sqhk.co/rozopebak/jH3OMja/sdge_san_diego_address.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nodefojabotozij.rf.gd/mokiwutimasezixopa.pdfIn PDF document text
    • http://zobotipuzadevi.epizy.com/authority_letter_format_for_us_visa_collection.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/gobin.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/sceptre_tv_remote_control_manual.pdfIn PDF document text
    • http://koriguno.rf.gd/42794148258.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_off0000bf58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF58 5288 bytes
SHA-256: 0dc91bbe6031d0a962bf7f43b5d8eef73491af341d0871f5797bc0861fb368ff
font_01_sfnt_off0000d118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD118 10028 bytes
SHA-256: ab5bfea1d5555da7f1d427144e36e5c995f4c27290168cf4632036a63e8302a4