Malicious PDF — malware analysis report

Static analysis result for SHA-256 74249252dbc686dc…

MALICIOUS

PDF

77.4 KB Created: 2021-01-28 19:41:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 7c8f6644294d284632c2b8b5414bd443 SHA-1: 2047738ce531868a46b523bb08dfd232ab03e4a9 SHA-256: 74249252dbc686dc9b4db059faa4417ff7f209ee6ddcf76b90c1593bb5049ba8
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wb?keyword=evolution%202001%20trailer PDF link annotation
    • https://natitapa.weebly.com/uploads/1/3/1/3/131379406/f85d9a5ab5f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365584/normal_5ff2683bdab51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_600f278b51a26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455208/normal_5fdae2c5631b9.pdfIn PDF document text
    • https://nekazexupogufeg.weebly.com/uploads/1/3/1/4/131454238/ce63325740.pdfIn PDF document text
    • http://sunepoxuvigos.66ghz.com/23498145543.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420745/normal_5ffe9a3b95d47.pdfIn PDF document text
    • https://tubekari.weebly.com/uploads/1/3/1/6/131636965/vugul.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/varoximu/gomuzedinopizelorove.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/80471131769.pdfIn PDF document text
    • http://leporib.epizy.com/xevatukigufa.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/absenteeism_in_nursing_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/beginners_guide_to_seo.pdfIn PDF document text
    • https://s3.amazonaws.com/mokixetat/europe_trip_planning_guide.pdfIn PDF document text
    • http://gagafexekoxoseb.epizy.com/xatavekizapuxet.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_off0000f01f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01F 4844 bytes
SHA-256: 8e3075f43463aedc04668b4c6f2db9d625fd46c1984697077c8f41ce61e37450
font_01_sfnt_off000100af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AF 11472 bytes
SHA-256: cc819b0563c8da9f521c654255f2a46c7b6ab28309611cbf2c6d5fa60bef7b10