Malicious PDF — malware analysis report

Static analysis result for SHA-256 a735bf91f92f4aaf…

MALICIOUS

PDF

76.2 KB Created: 2021-03-02 01:21:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: dc0b3ae922f453cdf8a97e71294125a5 SHA-1: d2293d66f91bd9ad521ba5f7aa1ebe147e2f1aa1 SHA-256: a735bf91f92f4aafadb712afb2fa370473c80fb22fecd19c22ec06ad53dc83b1
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=how+government+encourage+entrepreneurship In PDF document text
    • https://cdn.sqhk.co/kogoruzojif/sgiRPjQ/naludav.pdfIn PDF document text
    • http://vebilodugisugod.iblogger.org/ar-15_scopes_vortex.pdfIn PDF document text
    • https://cdn.sqhk.co/xivovido/VLnqjjh/32520602151.pdfIn PDF document text
    • https://cdn.sqhk.co/xubipoxeguza/MjidFUe/social_media_post_maker_social_posts.pdfIn PDF document text
    • http://saudiautoinsurance.com/manual_comfortstar_aire_acondicionado4og95.pdfIn PDF document text
    • http://carbags.site/dimonenufevopadajupakivajfachy.pdfIn PDF document text
    • https://cdn.sqhk.co/zubejavaxuvu/WVjhgdb/xapenedilevunirij.pdfIn PDF document text
    • http://bufanono.iblogger.org/interjection_worksheets_for_grade_7.pdfIn PDF document text
    • http://instas.site/98206587299t6j8b.pdfIn PDF document text
    • https://cdn.sqhk.co/pafitevet/hfIgign/woguxujosip.pdfIn PDF document text
    • http://paselon.getenjoyment.net/poligolibaruzamovi.pdfIn PDF document text
    • http://watertea.space/angular_set_value_nested_formgroupcggx2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://magakawigola.epizy.com/98502856088.pdfIn PDF document text
    • http://poramukuwulaji.epizy.com/al_azhar_university_egypt_application_form.pdfIn PDF document text
    • http://webifojut.epizy.com/98015784139.pdfIn PDF document text
    • http://fotafufoka.epizy.com/aws_certified_developer_associate_examination_guide.pdfIn PDF document text
    • http://nivugugop.rf.gd/samsung_jitterbug_car_charger.pdfIn PDF document text
    • http://rupufak.epizy.com/tirarirosujaje.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_off0000edd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD2 5428 bytes
SHA-256: d806b013210e90dc0f339ff074b9d200c18658ab8864fd69c277e7d6f80a73aa
font_01_sfnt_off0001003c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003C 10444 bytes
SHA-256: 82b360777d1964f617f43e670f476d4fbc94a01b5c532e6745cf7f4436feffc8