Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cb0e0f3e6b7c5eb…

MALICIOUS

PDF

73.4 KB Created: 2021-02-12 08:15:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2da7bc46df9927e70cbf9dcfa03e00c1 SHA-1: 7b685f3ca47a70ce8a65f15c3394f96c478c49d5 SHA-256: 5cb0e0f3e6b7c5eb779aa8275ebe636365a1b2b55f54702027f65798b26ccd09
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/wb?keyword=excel%20bedingte%20formatierung%20farbe%20anderer%20zelle PDF link annotation
    • https://kapexuzavum.weebly.com/uploads/1/3/4/6/134691047/fumosigodiw-wifakul-zujufuw-laxigerex.pdfIn PDF document text
    • https://ketabanajav.weebly.com/uploads/1/3/4/7/134707818/1164992.pdfIn PDF document text
    • https://wesuzimowigimeb.weebly.com/uploads/1/3/4/7/134745326/0d127.pdfIn PDF document text
    • https://genofegewad.weebly.com/uploads/1/3/0/7/130776157/bevawugova_kiwobakukaz_vujev.pdfIn PDF document text
    • https://jikujumek.weebly.com/uploads/1/3/5/3/135318263/zowodujoguveme-ginoriwujakado-dobekijosunik-xalukobel.pdfIn PDF document text
    • https://vomenipof.weebly.com/uploads/1/3/4/5/134585177/8439830.pdfIn PDF document text
    • https://napuximijagebi.weebly.com/uploads/1/3/4/7/134766840/898872.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/fukezavazuj/75899495208.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/asura_arasan_tamil_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/bhojpuri_arkestra_song_dj_remix.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/wepubunopebaxudulu.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/jugibonirapigofilez.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/63331393255.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/tools_for_formative_assessment_in_scholastic_domain.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/60712891599.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_off0000df50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF50 5376 bytes
SHA-256: bc82081892b693b16f22aa8b0f1345fac5beddd03d6a1c53e957363da905d927
font_01_sfnt_off0000f195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF195 11672 bytes
SHA-256: 2dc9c4bca95a161b09c85ffd03c8cc24afb7d1395035ee5d47a9c7ed3fc8f8a8

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