Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a36175a4819b64f…

MALICIOUS

PDF

42.0 KB Created: 2020-11-06 19:49:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 149360a9fcf74d4714690b028dbb614b SHA-1: a488688ea70604ec81158d522d212b82a5499097 SHA-256: 6a36175a4819b64f12fdf28f73682da7e679f5d4668925954e9f303faaf85d11
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://trafffe.ru/123?keyword=climate+map+of+chile PDF link annotation
    • https://kuzewejutoba.weebly.com/uploads/1/3/4/3/134398832/wirobir_paguvasarafun_juvilin_faxupivafezexa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461791/normal_5fa5388cc233a.pdfIn PDF document text
    • https://mufebukevep.weebly.com/uploads/1/3/4/0/134096334/4066353.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/8133127.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/e5bcd2697.pdfIn PDF document text
    • https://nibojesuko.weebly.com/uploads/1/3/4/3/134329062/1246277.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/6182884.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/022d0b9a-6258-46c3-b4b0-8dee437125a2/36272922375.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1ca777f-a1d2-4acd-8d73-2d017a5d4aad/makita_n1900b_planer_manual.pdfIn PDF document text
    • https://suvarofora.files.wordpress.com/2020/11/lodebukiworidu.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/sofisukurituzulu.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/dafotokawutere.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/kunev.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/practice_driving_games_free.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_off000067a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67A4 4888 bytes
SHA-256: 50eff1260f751d9d98f04e4dc6d3e663592003327328ce69d34b3e75d2af2cf5
font_01_sfnt_off0000781d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x781D 10660 bytes
SHA-256: 6c3f8dadec2381497d69ecd3f6bc4f66a9eaa63ad810232b462d186c34bd6704