Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd47b76a7cf8e683…

MALICIOUS

PDF

68.4 KB Created: 2021-01-24 01:59:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: ad37f00174e43ec09f13aee9c187ab5d SHA-1: 4e297f08a9ca6e42d6bf71e39f72eb0f41771f97 SHA-256: bd47b76a7cf8e683adfa0ae1728c0ce0a7a7d5a403e96797d212f6066f080330
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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/wb?keyword=change%20the%20voice%20exercise%20for%20class%208 PDF link annotation
    • http://gesufumepemu.22web.org/clear_cache_android_8._0.pdfIn PDF document text
    • https://site-1173589.mozfiles.com/files/1173589/zupogoranizomagafisimag.pdfIn PDF document text
    • http://nimolebefiv.22web.org/english_french_accounting_dictionary.pdfIn PDF document text
    • https://site-1177523.mozfiles.com/files/1177523/subway_princess_endless_royal_run_download.pdfIn PDF document text
    • https://site-1175189.mozfiles.com/files/1175189/tigujajekimabe.pdfIn PDF document text
    • https://site-1252989.mozfiles.com/files/1252989/spelling_connections_grade_5_unit_13_answers.pdfIn PDF document text
    • https://site-1167993.mozfiles.com/files/1167993/growtopia_tools_free_download_ios.pdfIn PDF document text
    • https://kojaresojew.weebly.com/uploads/1/3/4/3/134312518/lanobosabikozi_bizonomobi_ludopob_tuxeratagiwon.pdfIn PDF document text
    • https://site-1174609.mozfiles.com/files/1174609/81592691989.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/vavebufevodutob/exchange_student_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/diforovunalixu.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/zawejezudasuwudaxur.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/laziness_does_not_exist.pdfIn PDF document text
    • http://wikatefa.epizy.com/sapine.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/22352758816.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_off0000cff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF6 5372 bytes
SHA-256: e4512d65fb54517265aa25b0a33ff86c982441322b32a9a281e024beac15c767
font_01_sfnt_off0000e241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE241 10176 bytes
SHA-256: f7de099d8afbac1276b428420ba26cea71b76de0e87e61d2f8b4d6b90840daf9

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