Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeadb7f833a655c1…

MALICIOUS

PDF

70.9 KB Created: 2021-02-11 07:41:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 775aabbbbf0425776e6e5941730c6a69 SHA-1: 64bcae64c0ff066d615a3dba4665567e11659644 SHA-256: eeadb7f833a655c1485175644ad7f83487c15c5fe60e4474d39a37121ea710ee
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/123?utm_term=amsco+chapter+27+guided+reading+answers PDF link annotation
    • https://buxomajuse.weebly.com/uploads/1/3/4/5/134588570/4523d2603.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475197/normal_6022cbfd34085.pdfIn PDF document text
    • http://sagewusibuz.iblogger.org/top_android_games_apk_data.pdfIn PDF document text
    • http://fexevosekuzavep.iblogger.org/6986956064.pdfIn PDF document text
    • https://vukibipodut.weebly.com/uploads/1/3/4/6/134690361/48747.pdfIn PDF document text
    • https://jebunofom.weebly.com/uploads/1/3/4/4/134468214/1feaa.pdfIn PDF document text
    • https://jatilupek.weebly.com/uploads/1/3/4/4/134491857/xorimizawabad-witakunobitaj.pdfIn PDF document text
    • http://strgb2.ru/ahu_and_fcu_systembrr2b.pdfIn PDF document text
    • http://eurostore.info/1503802048w3j8c.pdfIn PDF document text
    • http://static-get.top/sopa_de_letras_para_cuarto_grado_bloque_2epwgk.pdfIn PDF document text
    • https://gesogakit.weebly.com/uploads/1/3/4/5/134581759/fedopep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xikunajuverew.rf.gd/assessment_for_learning_thesis.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/48888590644.pdfIn PDF document text
    • http://vudalulok.rf.gd/bibliography_format_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/understanding_public_policy_13th_edition.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_off0000d90a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD90A 5748 bytes
SHA-256: 580b1b367fd1ebf5d2c0f23094d9edc1e94478e6303b4531c2be42290604af37
font_01_sfnt_off0000ec83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC83 10036 bytes
SHA-256: 85304ece304544c78f9052d7e613fa278420ad1362bde52633884e10d000e069