Malicious PDF — malware analysis report

Static analysis result for SHA-256 cedea51bf905555a…

MALICIOUS

PDF

73.0 KB Created: 2021-02-26 00:06:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 19492cb76bc91a02144f9e9a90db9492 SHA-1: 2cfbdb5f9a21f7fd06741039d200d530299d97d0 SHA-256: cedea51bf905555a3806b4c6f60415c42c84ca21bb15d7a656aeaf52e0fc5f32
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://bologen.ru/wix?keyword=chapter+12+forces+and+motion+assessment+answers PDF link annotation
    • https://xikipavukageza.weebly.com/uploads/1/3/0/7/130776529/fodox-bagavipubu-jodupav.pdfIn PDF document text
    • https://danikobunib.weebly.com/uploads/1/3/4/7/134755608/xubusijazidigo-tepexovaxetat.pdfIn PDF document text
    • https://cdn.sqhk.co/sozaxejiv/ZHtOCgf/jolumaremak.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/tusudapiwazomavuxebomo.pdfIn PDF document text
    • https://sidugavumudoriz.weebly.com/uploads/1/3/4/9/134902227/farexerurewiw.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/78605136171.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wififeju.atwebpages.com/panasonic_phone_kx_tga410_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/risk_assessment_table_format.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/80894190442.pdfIn PDF document text
    • https://s3.amazonaws.com/xakajoziwibi/invisible_fence_transmitter_blinking_green_light.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/87721376740.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/installation_guide_linux_mint.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_off0000de27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE27 5544 bytes
SHA-256: 370f783425aad2b310e3e3423bf7d5ee126aa3d695f9f98562a2f918f74f9bfa
font_01_sfnt_off0000f0ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EA 11776 bytes
SHA-256: 626cbb62f925a6eb39fe41f77c03b25431fbc7920a5e8846260b0771220ddc95