Malicious PDF — malware analysis report

Static analysis result for SHA-256 18f3299402a73967…

MALICIOUS

PDF

71.1 KB Created: 2021-02-14 07:37:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 05cb136efdffc7a0f115690a8dcb27a5 SHA-1: 1d0bd8731b720c022226e6a9ad5a775645b775be SHA-256: 18f3299402a7396767260e39ecce8e8bb74a1e30f636ac37a6dbe0cc347bd1cd
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://druttle.ru/wb?keyword=breezing%20forms%20plugin PDF link annotation
    • https://tejalegevususo.weebly.com/uploads/1/3/1/6/131637178/balizixunawez_jopova_xalelan_zinoruvesux.pdfIn PDF document text
    • http://lenorimageb.iblogger.org/antonym_worksheet_for_grade_3.pdfIn PDF document text
    • https://pegigisujojefuf.weebly.com/uploads/1/3/1/4/131413718/ae06591969c403c.pdfIn PDF document text
    • https://cdn.sqhk.co/datimemovuko/iffjil7/54008127984.pdfIn PDF document text
    • https://menegelobeka.weebly.com/uploads/1/3/4/9/134903334/sovujutezuk-dirobefozatige-ruwowosiguzep-kisalalamukok.pdfIn PDF document text
    • https://pameduvexeligim.weebly.com/uploads/1/3/4/5/134579292/nabugajevoba.pdfIn PDF document text
    • https://molawaxurot.weebly.com/uploads/1/3/4/6/134699933/jarafozusarexu-vopodabimejes-nolazopolelu-motipej.pdfIn PDF document text
    • https://pepizowa.weebly.com/uploads/1/3/2/7/132711999/mukogefoxeketinikeve.pdfIn PDF document text
    • https://pukaxonimuno.weebly.com/uploads/1/3/4/4/134435323/2876637.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/xukirizugukugi/common_app_transfer_college_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/facebook_lite_pc_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/41818293169.pdfIn PDF document text
    • http://pubitawiwinas.rf.gd/sijusesuzukoninuzafime.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/articles_of_organization_template_louisiana.pdfIn PDF document text
    • http://bofogaf.rf.gd/calibre_ebook_windows.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_off0000d7e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E3 5112 bytes
SHA-256: 6bc5eab5d6266d3297ede1c93b6e5e03b957d0078029ac36f9530e843a64cfda
font_01_sfnt_off0000e947.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE947 11276 bytes
SHA-256: 3aed0e745f8b11468d35ee54399b1eae625c791e4c7e4c03a11d453101478568

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