Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e088a02a536ce1…

MALICIOUS

PDF

75.7 KB Created: 2021-02-23 11:46:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 9f46f3297a1d68c185cdf919583bbc59 SHA-1: 78a2ff60648fe12220df974fcd1e6ba5df452d75 SHA-256: 89e088a02a536ce13abbe4ca170f4ab46b89092a9327ca4b3b2ca90b4296368e
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/strik?utm_term=solving+inequalities+review+worksheet+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4367914/normal_5fce6138b3b84.pdfIn PDF document text
    • https://dilemawusufugo.weebly.com/uploads/1/3/0/8/130874642/xexapemivem_rusirarulivu_mosigexeb_nomobuxolaf.pdfIn PDF document text
    • https://rinezafuwokof.weebly.com/uploads/1/3/1/4/131437641/7459371.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475582/normal_5ff7ff54f1224.pdfIn PDF document text
    • https://lalinixew.weebly.com/uploads/1/3/4/2/134265361/boredufazotago.pdfIn PDF document text
    • https://dibevapanowodi.weebly.com/uploads/1/3/0/7/130776811/redifikesuxolu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459320/normal_601554f880f03.pdfIn PDF document text
    • https://sukizasatesez.weebly.com/uploads/1/3/4/6/134686833/nizunelejulivu_josilas.pdfIn PDF document text
    • http://tedamowajowiw.22web.org/xarojamegajesufisefegi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492240/normal_6004bf35f18d6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/graphing_systems_of_equations_worksheet_7-_1.pdfIn PDF document text
    • http://rigelosatabureb.epizy.com/google_play_chrome_android.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/barfi_movie_with_english_subtitles_free.pdfIn PDF document text
    • http://lepijolunirug.epizy.com/jelewojujezapenilajasa.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/iphone_imei_check_all_information.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxefemebidaz/sample_letterhead_templates_for_business.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/autocad_2007_softonic.pdfIn PDF document text
    • http://suzurexitumafod.epizy.com/save_layout_template_autocad.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_off0000e73e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73E 5748 bytes
SHA-256: 2775edf47a23f8f663557d51879f5ec8abed5811419864115f23ae53701ab4ca
font_01_sfnt_off0000fadc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFADC 11436 bytes
SHA-256: b5dc964228f76165e6c073219f5ef362d1be5ae5c9148917aa0e111af7a79d94

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