Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4c520e4ff098589…

MALICIOUS

PDF

46.4 KB Created: 2020-11-08 02:49:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 3d0b089931af6c147beac99b1f9e3441 SHA-1: ba35e85940e0f15fd9cd25d7c0a2896bde67fd5d SHA-256: b4c520e4ff098589d83f6649dabb74fce94b12ca7ee6237f7563740928988c3d
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://traffset.ru/aws?keyword=poem+when+you+are+old+by+william+butler+yeats PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f890e1c5b5bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5f9f5c117cc44.pdfIn PDF document text
    • https://nugaginidej.weebly.com/uploads/1/3/4/4/134475369/21738.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370317/normal_5f8d71b98551f.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/38767d10-1409-48d5-817a-3048dad0cd58/gilenokexila.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/moulton_gun_club.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da65de4a-086b-4279-aa64-0d4768f2c059/49102767496.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/binomial_calculator_online.pdfIn PDF document text
    • https://semumawi.files.wordpress.com/2020/11/8950735449.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/fragment_run-on_worksheet_middle_school.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_off00007710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7710 5400 bytes
SHA-256: a5aa7f134620119cdf2c92a50d134eff85f280c09cb8182911753dae23d0c6bf
font_01_sfnt_off0000894b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x894B 10560 bytes
SHA-256: bb50a0d194f5a113e4319520037e142452fedf222485d326a3f262b880a2b49a

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