Malicious PDF — malware analysis report

Static analysis result for SHA-256 70d3f076d29efc50…

MALICIOUS

PDF

66.8 KB Created: 2021-03-01 21:19:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c36fc45c4f707e742d97a87b8e31dc73 SHA-1: 4b5b3f83aee1081bc585acc1d1a3efce47172f24 SHA-256: 70d3f076d29efc50234f8a399061ab22bae90b6830211ee716328abe8b3e05d3
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/aws?utm_term=brightness+contrast+hue+saturation+ppt PDF link annotation
    • https://cdn.sqhk.co/fopalixogul/idcjagf/7816130836.pdfIn PDF document text
    • http://1freedom.space/introduction_to_financial_accountingthlv0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443576/normal_5fdec36f0d01f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444092/normal_5fd2df3acc1e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455195/normal_6032555e06eef.pdfIn PDF document text
    • http://fitokapss.xyz/how_to_configure_picostation_m2xw2cj.pdfIn PDF document text
    • https://jodegometokak.weebly.com/uploads/1/3/1/6/131606115/xafewisoguxif.pdfIn PDF document text
    • http://bioforce-co.site/antivirus_microsoft_security_essentials_64_bitvd8ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369311/normal_601381e7d6155.pdfIn PDF document text
    • https://gawofatofuwe.weebly.com/uploads/1/3/1/3/131380275/mavuxevajeg-nululax.pdfIn PDF document text
    • https://watilokid.weebly.com/uploads/1/3/1/8/131856522/gomugokulixubejofe.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/mejifavo/fasabowokabeto.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/idsa_cap_guidelines_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/33867546352.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/candy_camera_selfie_for_android.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_off0000c8ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8EC 5212 bytes
SHA-256: 710eaaadf2cffaa92bb34a66e36eb4c5d59238c57beaa132f989ffebf6de3e81
font_01_sfnt_off0000daab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAAB 10372 bytes
SHA-256: e7b0b36fb0d877e72a1621b9b89e1360053cd24d42265bd9a61388e02a373870