Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aaf354c94c57389…

MALICIOUS

PDF

72.1 KB Created: 2021-02-24 20:36:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: c34159c40cd6ec911bb0c16555ec6031 SHA-1: 9144a7a610fab62d6481dccc8e87c80dcc793d3c SHA-256: 0aaf354c94c57389cd1929bd31007d5e63beadb844d398fd22562bcfa31269ff
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://yafferge.ru/award?keyword=how+to+type+bubble+letters In PDF document text
    • http://50offshop.info/66243545299p3vzz.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/free_sheet_music_lds.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/what_is_an_average_salary_in_dubai.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371809/normal_601f679de4f9c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tituxotal.epizy.com/ct_coronary_angiogram_report.pdfIn PDF document text
    • http://mefetapa.rf.gd/pokemon_tabletop_adventures_2.1.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/pisakuzube.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/kenmore_microwave_790.803_size.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/balance_sheet_of_nestle_2017-_18.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/oracion_para_la_corona_de_adviento_2018.pdfIn PDF document text
    • http://sedilar.rf.gd/vuxafasafi.pdfIn PDF document text
    • http://tujijekaxevon.rf.gd/lufonelita.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/mulinis.pdfIn PDF document text
    • http://lusiwavi.rf.gd/77834688605.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_off0000df57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF57 4896 bytes
SHA-256: b4dbf4974d4c5165a2715ba9befe59aefdba3228edec360104bca853eeab29fd
font_01_sfnt_off0000f01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01C 10436 bytes
SHA-256: a8126bc9de1e3076f3081cb75c5a5394e35eccd637546ae9349964ee6a1274f0