Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8de5ea44696820c…

MALICIOUS

PDF

66.1 KB Created: 2021-02-28 21:53:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b40141a57e24b61353d75b7c878c1d26 SHA-1: e23ba6b9fe35dfc41132232abca483dc578be96b SHA-256: b8de5ea44696820cd9e1a59039b4d88be23b7672e1e976a3f33ab763d9be0fe4
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://crophysi.ru/award?keyword=how+many+calories+in+a+sonic+cookie+dough+blast In PDF document text
    • https://kokezixunilo.weebly.com/uploads/1/3/4/0/134096179/zugubak_surizalogetuma.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwonesi/jil7Xgi/39180228675.pdfIn PDF document text
    • http://gujufifirisin.22web.org/pokemon_explorers_of_sky_evolution_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374540/normal_602c269770ce8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457305/normal_603b18014ba41.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368265/normal_5fef3f25216ec.pdfIn PDF document text
    • https://fabirakarag.weebly.com/uploads/1/3/2/7/132710689/7668160.pdfIn PDF document text
    • https://berajodisi.weebly.com/uploads/1/3/4/6/134651265/vosidadelala.pdfIn PDF document text
    • https://cdn.sqhk.co/sopiloroda/S2jjLqv/1322759602.pdfIn PDF document text
    • https://cdn.sqhk.co/lepagesali/iieprig/real_steel_2011_full_movie_download.pdfIn PDF document text
    • http://xogefod.iblogger.org/is_cloud9_good.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459921/normal_603167652c99e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://temomuduzuba.epizy.com/bitcoin_trading_app.pdfIn PDF document text
    • http://wetavirevamo.epizy.com/pec_exam_result_2018_marksheet.pdfIn PDF document text
    • http://sasoregasot.epizy.com/gimin.pdfIn PDF document text
    • http://zozezad.epizy.com/30783218456.pdfIn PDF document text
    • http://mivolipo.epizy.com/character_analysis_worksheet_high_school.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_off0000c4cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4CD 5712 bytes
SHA-256: 9b4ba602982b006980187b86f7a96b9b6f95f3d5775fab3c2ce0d1909e1512d9
font_01_sfnt_off0000d823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD823 10280 bytes
SHA-256: 8018286e7e8e01d3ce5227b515507e0681db42c55fe84c2d8327740633e139de