Malicious PDF — malware analysis report

Static analysis result for SHA-256 37ffa9f462d7fe46…

MALICIOUS

PDF

78.3 KB Created: 2021-02-17 20:36:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c2942a8a110787edc9fc6522bcd3895c SHA-1: 3498ec01e039b9147680328e90b09555bb1f8fad SHA-256: 37ffa9f462d7fe46af0db202aaad60d0d2e0bce69070e4379a34baf6996fb9ce
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/aws?utm_term=speed+queen+front+load+washer+ratings PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413842/normal_5fd3ce2fd7bdf.pdfIn PDF document text
    • http://zewojapu.22web.org/926816524.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379602/normal_5ff219d11ce64.pdfIn PDF document text
    • http://kmplitka.shop/xamegiw49gwj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479435/normal_600af93226a7e.pdfIn PDF document text
    • http://stav-games.ru/25792368874ii6xe.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/rimepusox/moronubikuku.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/73817551209.pdfIn PDF document text
    • http://zesositug.epizy.com/62453969326.pdfIn PDF document text
    • http://vowatutijetig.rf.gd/30_day_ab_challenge_nutrition.pdfIn PDF document text
    • http://mowigefugitixa.epizy.com/caries_en_nios_en_mexico.pdfIn PDF document text
    • http://rilenipavow.rf.gd/investment_appraisal_journal.pdfIn PDF document text
    • https://s3.amazonaws.com/fowonaxul/coliforms_present_in_well_water.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/area_of_a_circle_khan_academy_answers.pdfIn PDF document text
    • http://niwuzowebod.epizy.com/procurement_contract_award_letter_template.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_off0000f26d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF26D 5624 bytes
SHA-256: 374f98ae122e6781c158bf13c1a26e7eb80866a96f12e617deb46a3261a7b101
font_01_sfnt_off00010592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10592 11480 bytes
SHA-256: 9c155dc1162becd1995c33b5c82232232694379f050d4ad3abb6bb2127654b24