Malicious PDF — malware analysis report

Static analysis result for SHA-256 38658b2bba0cf1cd…

MALICIOUS

PDF

37.1 KB Created: 2020-11-09 09:57:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: bcb81e5c760a1acc8d15b8ba1dd80c5e SHA-1: 591cbc5a2cf24192bf4a47b8ffa1c4f6fbe5ed78 SHA-256: 38658b2bba0cf1cd726224d585b99b78241357a5707ba65fbf878cd3f2897a23
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=armuchee+high+school+rome+ga PDF link annotation
    • https://sowufaxekip.weebly.com/uploads/1/3/2/7/132710719/39f4294644fda97.pdfIn PDF document text
    • https://voxapinave.weebly.com/uploads/1/3/2/7/132740917/6742352.pdfIn PDF document text
    • https://xixafaxuxux.weebly.com/uploads/1/3/4/3/134340403/02a11.pdfIn PDF document text
    • https://zalopajozi.weebly.com/uploads/1/3/1/4/131453352/senopizexiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418369/normal_5f9b5731a34fb.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/92a3b932-ce57-429c-9ac2-af93f1d4178b/mefetujefarib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c11c7d5d-e4db-48c8-9acd-578ccaeeb875/kunakeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c381d923-99b8-4183-b155-76a53507ebce/manual_biblico_nelson.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_off000050ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50AD 5204 bytes
SHA-256: c77c28e320434fc5f595609a89759dc40cb7f99b7f2def5012ab464dee23d49f
font_01_sfnt_off00006236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6236 11268 bytes
SHA-256: b18e627f00ed10c4063dde9cd0331efd5b7ef55aa84456e8608066914f994d42

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