Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3fdd844eb91b37b…

MALICIOUS

PDF

65.7 KB Created: 2021-02-05 08:40:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 6eb9619a49fe93b4514e4e38d8c7798b SHA-1: 176812a419250c431986022d7c20381cc6571678 SHA-256: d3fdd844eb91b37b1d1dadcb7e10d5881f1b7e510249db70b0d682690497ffd6
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=printable%20welcome%20home%20banner%20template In PDF document text
    • http://copyrightshelpcenter.com/13258315609i1tv3.pdfIn PDF document text
    • http://lessonsonline.site/bogy_s_babca_meseqonku.pdfIn PDF document text
    • http://ulekschool.online/gelobidemifiwelolazijimowflyvi.pdfIn PDF document text
    • http://originalhallyu.com/roma_gezi_rehberig2ahy.pdfIn PDF document text
    • http://help-ruleviolation.com/audio_visual_aids_in_teaching_englishlkpyc.pdfIn PDF document text
    • http://save50.pro/geological_history_of_oxygen_worksheetg0h6p.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://turimovikukori.epizy.com/adjunct_professor_cover_letter_template.pdfIn PDF document text
    • http://pifamodaz.rf.gd/compliance_auditor_job_description.pdfIn PDF document text
    • http://vejebuta.rf.gd/75230573501.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/guide_lyskamm_4000.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/87358575503.pdfIn PDF document text
    • http://jofanemapax.epizy.com/krones_bottle_washer_manual.pdfIn PDF document text
    • http://sewesomepajava.epizy.com/zagaresukelegefif.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/38199862997.pdfIn PDF document text
    • http://lewamomad.epizy.com/demuzobirimozutivufowiv.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_off0000c62c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC62C 5228 bytes
SHA-256: 696fa27cd1a37db80e5b524dccb126bed83e8dd8f3cb44a3d3eca4bb766bd3ca
font_01_sfnt_off0000d7d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D8 10024 bytes
SHA-256: 952ab5580413dccece4ebe1c55c5dbe5f3527655cf3e38c45d425f926c1a8249