Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ccb2d17e51f7749…

MALICIOUS

PDF

74.6 KB Created: 2021-02-15 17:01:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 2c2be8838a8b629143e4afe89c25fb12 SHA-1: 23f8bb1d8009797adbd8509824eb46d8d932e6d2 SHA-256: 5ccb2d17e51f7749913cc7ee1837f099e0974a211d0a9d4c28ac71751cf7acc0
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://baarspo.ru/wb?keyword=linear%20algebra%20kenneth%20hoffman%20solutions%20pdf PDF link annotation
    • https://kefomituwo.weebly.com/uploads/1/3/2/8/132815939/85579.pdfIn PDF document text
    • https://kozowesojufeg.weebly.com/uploads/1/3/4/7/134717080/ceaed1e65fc0.pdfIn PDF document text
    • http://ribupisid.22web.org/44179746968.pdfIn PDF document text
    • https://xajerunufunofe.weebly.com/uploads/1/3/1/3/131378991/sesetiwigedejanaja.pdfIn PDF document text
    • http://xuxisozolawub.22web.org/bhupendra_khatana_ke_naye_rasiya.pdfIn PDF document text
    • http://lobuzef.iblogger.org/91622954231.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gedikoti.epizy.com/5046881240.pdfIn PDF document text
    • http://jakepejeto.rf.gd/design_template_definition_computer.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/vanessa_butterfly_valve_installation_manual.pdfIn PDF document text
    • http://foperibonar.rf.gd/nogifitiv.pdfIn PDF document text
    • http://lamuverifob.epizy.com/ramzan_naat_2018_audio.pdfIn PDF document text
    • http://bogasupi.rf.gd/dofinajo.pdfIn PDF document text
    • https://s3.amazonaws.com/jusuberu/57114377069.pdfIn PDF document text
    • https://s3.amazonaws.com/natewared/82472326422.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/razufeteboji.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/indian_army_photos_shayari.pdfIn PDF document text
    • http://topotiras.rf.gd/business_letterhead_word_format_free.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/29208365526.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_off0000e419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE419 5600 bytes
SHA-256: 66a4fec4f4f6af25bfc39f00b66fc486a7a40aa9c51e4fbf3209cccacc8e4d83
font_01_sfnt_off0000f6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FC 11316 bytes
SHA-256: a1b989a845565e9c7c6b8b7f08ebe5a3a8232e667383da0d71bf33896d80f610