Malicious PDF — malware analysis report

Static analysis result for SHA-256 b49b299e2b979ebf…

MALICIOUS

PDF

75.8 KB Created: 2021-03-14 19:01:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4dcb345c44091d86a094e755340929e6 SHA-1: 7fe35cf0f704add0d0da8cdaee30fc5a4549f194 SHA-256: b49b299e2b979ebf629579d2738d6b5192aee91583eae07cb7f2a0a61965dee0
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • 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://kuzutuzo.ru/strik?utm_term=mathematical+formulas+for+shapes+pdf PDF link annotation
    • https://vobikonim.weebly.com/uploads/1/3/5/3/135390296/vabajezutoves_dopimidi_vuvuxo.pdfIn PDF document text
    • https://kawuzuke.weebly.com/uploads/1/3/1/6/131606938/semagilik.pdfIn PDF document text
    • http://nowanedilado.22web.org/dka_pediatric_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/aUbJJvw/77352275376.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404514/normal_60464d29cb76d.pdfIn PDF document text
    • https://datagoso.weebly.com/uploads/1/3/4/7/134718767/7fab8b.pdfIn PDF document text
    • http://dedanafimek.iblogger.org/madagascar_map.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/jbyicAY/42058393657.pdfIn PDF document text
    • https://cdn.sqhk.co/lomotutuwe/eijgogj/44128960433.pdfIn PDF document text
    • http://tulinejifuwo.22web.org/13649595308.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380682/normal_6022c2289aabf.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/ibjfnIK/ikea_black_friday_ad.pdfIn PDF document text
    • http://jotaradade.iblogger.org/91360576698.pdfIn PDF document text
    • https://nepexinis.weebly.com/uploads/1/3/1/4/131438592/3056104.pdfIn PDF document text
    • http://bomufofo.iblogger.org/astm_steel_grades_chart.pdfIn PDF document text
    • https://retariluwefise.weebly.com/uploads/1/3/4/8/134858211/3917c027485b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbfef620-9cd4-4bd6-b61f-977dbad26d0c/fufagavixoxinap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdee9925-5bbd-4387-873c-1580be4dfed2/cursos_de_ingles_en_linea_gratis_sep_para_nios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0499cf2-4cf9-4c9f-b874-8dd394916c66/nirimuxijaboxutipijir.pdfIn PDF document text
    • http://wefitoxoke.epizy.com/sawirewowazisesoveluzifa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fde93bb-584a-492c-8c18-3389c14cbea4/41708463911.pdfIn PDF document text
    • http://mafakizukizunof.epizy.com/10583944075.pdfIn PDF document text
    • http://buwozefavimim.epizy.com/zabuge.pdfIn PDF document text
    • http://luzutajezilako.rf.gd/pizititikow.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_off0000e886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE886 5400 bytes
SHA-256: 5fa501592577f454f35b53e8b260c2198c62e41e0353aaa0b2453b4d8f6b007c
font_01_sfnt_off0000fac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC8 11144 bytes
SHA-256: 1df925cecb8e1736c774b5fd0d9e21b17e804bb9b7c0f62d6cafa3fd96d31af4

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