Malicious PDF — malware analysis report

Static analysis result for SHA-256 5731f352a3679a83…

MALICIOUS

PDF

72.4 KB Created: 2021-03-01 03:01:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 7df0a52400a32cb1d1497f7e56cc2fca SHA-1: d4629c90503ceb44bb61c8367f8ed659e2ba9adb SHA-256: 5731f352a3679a83bd6b37ea03ab2d9700f5b982c9ca02b2d668becdc1e9bb23
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/wix?keyword=ultra+for+presbyopia+fitting+guide PDF link annotation
    • http://zajifokabatu.iblogger.org/21175989604.pdfIn PDF document text
    • http://leaninrzpd.site/format_code_html_javascriptf9cbc.pdfIn PDF document text
    • http://copriyghtconfirmed.com/carnitina_subcutanea9edkl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368486/normal_603690817d0d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416151/normal_5fd97b5d65b9c.pdfIn PDF document text
    • http://christmas-gift.ru/how_to_remove_old_badger_5_garbage_disposalweatu.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/pizivurapab/xabevotugixikamedowadela.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/57420960229.pdfIn PDF document text
    • http://jufonab.epizy.com/bible_trivia_for_adults_multiple_choice.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/78294615656.pdfIn PDF document text
    • http://rumejumobu.epizy.com/debodirusibave.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/go_go_scooter_battery_box.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/excel_sum_multiple_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/dental_antibiotic_prophylaxis_guidelines_australia.pdfIn PDF document text
    • http://tikarere.epizy.com/lake_havasu_city_water_quality_report.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/munchkin_bottle_warmer_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/julipibupitu.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_off0000dd84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD84 5444 bytes
SHA-256: dc13d4951ffb7b4bcd3da1a2690b5a0f82167b67d02cb8c7f88e7309d259310f
font_01_sfnt_off0000f018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF018 10712 bytes
SHA-256: 7c21728b1a651954c6bedd2e9e5fa5379ab16b89a82172793fe29fde93d9a393