Malicious PDF — malware analysis report

Static analysis result for SHA-256 669929a4ff4890e4…

MALICIOUS

PDF

68.1 KB Created: 2021-02-16 19:43:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 79cb26f2b795235741bb9fd9b4f35582 SHA-1: 6a875d6a8e95ce155818e7aaedb46a8da70b7ca8 SHA-256: 669929a4ff4890e43e183f92d90c054ab8f123f16ac8b40165e5f4f20d401ecf
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://baarspo.ru/wix?keyword=prentice+hall+mathematics+algebra+1+textbook+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4457296/normal_5fddf9a474af9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427780/normal_5fd8cc498f50a.pdfIn PDF document text
    • http://bilujubogox.22web.org/describe_yourself_in_an_interview_sample_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405652/normal_602b390429400.pdfIn PDF document text
    • http://pafekusiwajida.66ghz.com/17623462747.pdfIn PDF document text
    • http://wilemavilaka.22web.org/zobefitizavamagan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481520/normal_5ffab06a373b3.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/xupizewuxere/fitorokutojo.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/agerigna_amharic_keyboard.pdfIn PDF document text
    • http://zomimek.epizy.com/87072907661.pdfIn PDF document text
    • http://jomewuborova.rf.gd/fuduroganulukelurelixax.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/16475859367.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/activesheet._protect_vba_example.pdfIn PDF document text
    • http://wipidomi.rf.gd/68862909485.pdfIn PDF document text
    • http://xulelaperimiku.epizy.com/driver_asus_x441u_windows_8.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/34942906588.pdfIn PDF document text
    • http://masoxagami.epizy.com/cisco_vpn_client_4._8.pdfIn PDF document text
    • http://wuwatomugexove.epizy.com/vepopamexe.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/16114937257.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_off0000c9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9EE 5892 bytes
SHA-256: 1d1530c0fdbaff47343ef759ecd3eeffbe3b3b5b32bf31df3fd3835819796134
font_01_sfnt_off0000ddda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDA 10480 bytes
SHA-256: 9b39f7c7b8a6938fefe7071f360c94bb99e2291e68702cb83797a587e815654a