Malicious PDF — malware analysis report

Static analysis result for SHA-256 407b748f4eb20494…

MALICIOUS

PDF

70.9 KB Created: 2021-02-15 09:25:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ae5b4679f3974ecf98e85329a311b0ad SHA-1: 9863fa375b39124f909ca15b85f984cf82203214 SHA-256: 407b748f4eb2049438c713e3e2b68827a8abc65667718e8d1e34921ae5eed814
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/123?utm_term=pioneer+woman+cookware+cast+iron PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366382/normal_6021ce243a4d3.pdfIn PDF document text
    • https://fabisinutufonos.weebly.com/uploads/1/3/5/9/135993578/02f324.pdfIn PDF document text
    • http://smartline58.ru/guzugelinizuxanubekixu46rbx.pdfIn PDF document text
    • http://tells.fun/aww_full_form_and_meaningeiuld.pdfIn PDF document text
    • http://deflecfcvy.best/diwalugubagajogazitenxnft.pdfIn PDF document text
    • http://summ-ita.space/lsat_prep_test_22_answerscry2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425009/normal_5fe2bdc5212a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425784/normal_5fdd055526310.pdfIn PDF document text
    • http://natorg.fun/citroen_c3_picasso_workshop_manualwxltf.pdfIn PDF document text
    • http://wellwork.site/devskiller_test_answersml9dw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410731/normal_60000d74a182b.pdfIn PDF document text
    • https://vunozeguwogiwe.weebly.com/uploads/1/3/4/7/134745761/52a380ccf43e428.pdfIn PDF document text
    • https://tepugajir.weebly.com/uploads/1/3/0/8/130874129/tiduvusovo_govepadi.pdfIn PDF document text
    • https://wosobariwosamu.weebly.com/uploads/1/3/4/3/134372044/bijur.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379973/normal_5fc7d50debec4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456982/normal_602151f015cfb.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/jodabiladezot/34220168290.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/facial_expressions_test_worksheet.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_off0000d978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD978 5068 bytes
SHA-256: fa801cd98ee767abe1bd6e64c7f482c41e07596eb22ac6048d2d08254c3312b2
font_01_sfnt_off0000eab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB0 10456 bytes
SHA-256: a5c891bdfb8239c443bb35fd90e2a698614c5cbca0d3c8491e679462489797be