Malicious PDF — malware analysis report

Static analysis result for SHA-256 8354ce3a98687c02…

MALICIOUS

PDF

74.7 KB Created: 2021-04-10 20:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 01d43f3dabbe31eb3d61b4b5c4a310d9 SHA-1: 7509f90e9d0517136a5fe5744e35736ff77fd434 SHA-256: 8354ce3a98687c0204272ff96461c1f02f37983c3d78e7542677c5320a992884
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 0.9997

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=how+to+fix+a+kenmore+refrigerator+ice+maker PDF link annotation
    • http://loberas.22web.org/wukelatavapilex.pdfIn PDF document text
    • http://shimano-stradic.ru/hp_laserjet_p2035n_compatible_toner_cartridgescf0tu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418972/normal_5fd64ad5e9044.pdfIn PDF document text
    • http://rudazaxume.iblogger.org/72716862051.pdfIn PDF document text
    • http://mivetys.xyz/burizusfwix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481424/normal_602aa72c15d5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421623/normal_6050932e31578.pdfIn PDF document text
    • http://grigolia-studio.ru/32938730903u6ocj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369324/normal_600324e9a5a20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458150/normal_60354e0446591.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://spencermcman.us/tiffany_solitaire_ring_images4m4j1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zegegapo.rf.gd/the_analysis_of_biological_data_first_edition.pdfIn PDF document text
    • https://7605c768-a471-4169-85a9-0dab509fd250.filesusr.com/ugd/20ab23_6fa43700754747a2958aadb9b36c587f.pdf?index=trueIn PDF document text
    • http://gexezamibakag.rf.gd/pathophysiology_of_bronchial_asthma.pdfIn PDF document text
    • https://828c6a01-da61-4814-986a-f72e64f4f334.filesusr.com/ugd/cdfdba_ea96c7375e8943cca3e2d41961e85d6f.pdf?index=trueIn PDF document text
    • http://pifujisebakiju.epizy.com/sujet_brevet_franais_2020.pdfIn PDF document text
    • https://e148473a-3d1a-46f8-b788-fbc1f5af68d4.filesusr.com/ugd/e1e70b_c6977d14529446439d16535ccf3a9259.pdf?index=trueIn PDF document text
    • http://fidusigugowubo.epizy.com/historia_y_evolucion_de_la_tabla_periodica.pdfIn PDF document text
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_15b04444797549a08a215f146665bffe.pdf?index=trueIn PDF document text
    • http://dotabujov.rf.gd/cephalopods_of_the_world_vol_1.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DE 5176 bytes
SHA-256: 3e811c2b608aff34649cb606fc4b4d50090a2a7521fbf44338532def49c227c4
font_01_sfnt_off0000f97e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97E 10012 bytes
SHA-256: a72ea96344486046a5d31b4a6354c388cf1c079a5d7b337e0bc45d0efefc7fe2

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