Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9d10fbe0595cdca…

MALICIOUS

PDF

68.7 KB Created: 2021-02-27 12:07:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 45ffd87b6ad8cae5e879dcab5409b8cf SHA-1: 93416b98cfd92f4d15a168fef3ce084b79b87a22 SHA-256: c9d10fbe0595cdca998d6698dc48d01f15ca24a6ca3342894287b37f1f9290bb
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains heuristics indicating it is a phishing lure, redirecting users to a malicious URL. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URL is likely used to download a second-stage payload or lead the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://xajibur.ru/wix?keyword=ingles+employee+handbook+pdf PDF link annotation
    • https://xajakubadom.weebly.com/uploads/1/3/0/8/130874473/xibosijona-lagenef-beleduj.pdfIn PDF document text
    • https://vigekajabaka.weebly.com/uploads/1/3/4/7/134708837/kilezeludowokizine.pdfIn PDF document text
    • https://wimukevefom.weebly.com/uploads/1/3/0/7/130739067/guniron.pdfIn PDF document text
    • http://granitmetrospecstroy.ru/bomojivebabafojilujafofasjji.pdfIn PDF document text
    • http://yourcy.com/34156744702nz0tk.pdfIn PDF document text
    • http://zahlungsservice-ch.site/que_es_soar_que_engaas_a_tu_parejakzkyr.pdfIn PDF document text
    • http://pressit.space/64456905774df69t.pdfIn PDF document text
    • http://lyudi23.ru/48623228129nzm82.pdfIn PDF document text
    • http://chempion.coffee/609042393291v9mc.pdfIn PDF document text
    • https://talunijepi.weebly.com/uploads/1/3/4/5/134599753/wukinowe.pdfIn PDF document text
    • http://xejopegig.mypressonline.com/how_to_become_tall_exercise.pdfIn PDF document text
    • http://italiabeach.space/igora_royal_pearlescence_color_chartxwmgn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nozozuwovore.atwebpages.com/retovevirakoba.pdfIn PDF document text
    • http://fukutinupamebo.rf.gd/78238082888.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/lusugoja.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/citrix_adc_vpx_200_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/livro_temperamentos_transformados_baixar.pdfIn PDF document text
    • http://bitines.myartsonline.com/kimuras.pdfIn PDF document text
    • http://bojefej.epizy.com/jowazelafoxamu.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/pestel_analysis_templates.pdfIn PDF document text
    • http://mopajob.rf.gd/how_to_open_the_adt_panel.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/original_captain_kirk_uniform.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_off0000ce6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE6B 5604 bytes
SHA-256: dd3791085e14a292ab13e33ac1ef5c8a575b5d89147843ebd9357f468ea93275
font_01_sfnt_off0000e15c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15C 10396 bytes
SHA-256: 7e7f5623f907e47368eda1d82aaaadb10e183a5eaa32f1963254488cf8b2bdc5

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