Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3fb0fa9cb52c419…

MALICIOUS

PDF

64.5 KB Created: 2021-02-17 06:11:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 35ac3ffe7b658d8a4b0332fa8df4733a SHA-1: e5e8b04dab3070ce6d4b29e01c7f625bc1bf8423 SHA-256: d3fb0fa9cb52c419aadaca2900bfb12d2bb4edc72b327f0b8b413a1c1d786166
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=decomposer+worksheets+free PDF link annotation
    • https://vuwuzujos.weebly.com/uploads/1/3/2/7/132712237/157165.pdfIn PDF document text
    • http://simekavo.22web.org/samsung_ubd-k8500_best_price.pdfIn PDF document text
    • http://pokypka.xyz/gexizitodokisawupegup0phky.pdfIn PDF document text
    • https://kebusivurokolu.weebly.com/uploads/1/3/5/3/135317059/kasufufovefo-popurimurevewop-donusosotideliv-teruwefuri.pdfIn PDF document text
    • http://reform-st.ru/inderal_davis_drug_guidet2edh.pdfIn PDF document text
    • https://zunepijubu.weebly.com/uploads/1/3/3/9/133986973/mazeriwopediba-jeditiwafubus-razosiletonuv-navekil.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/nuselufuzo/birla_mutual_fund_statement_of_additional_information.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/xeminesosisukuxonadisujag.pdfIn PDF document text
    • http://kosidigipetuvu.epizy.com/14640598352.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/17273708272.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/rurulanejotad.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/infectious_disease_society_of_america_guidelines_lyme.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/bloons_tower_defence_battles_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/blackberry_z10_firmware_android.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/neural_network_definition.pdfIn PDF document text
    • http://vivizegijarugip.epizy.com/power_episode_guide_and_air_dates.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/game_asphalt_8_mod_apk_pc.pdfIn PDF document text
    • http://soxomipimumoraz.rf.gd/kugibi.pdfIn PDF document text
    • http://vikogen.epizy.com/fozeximaziliduk.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/22054448192.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_off0000c087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC087 5168 bytes
SHA-256: 647ba995eaf400781c722706979cd420842e931bc97cc4ee1a28db315b171e49
font_01_sfnt_off0000d210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD210 10028 bytes
SHA-256: b00a99145709ce4f48b25396dd3d0d713529920b9f972151384b25d76ed39d2c

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