PDF malware analysis — malicious · 457d0299f4c8b5e8

MALICIOUS

PDF

64.7 KB Created: 2020-11-05 22:44:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10

MD5: 5efd91192eb16d41698a1d935f7364b5 SHA-1: 10770388ea30e7b602caf1743cb95407d4cbd266 SHA-256: 457d0299f4c8b5e802ea07a79462479b5a0f7f995e91a366de575313aa475c6b

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://trafffi.ru/123?keyword=answer+key+for+2.3.1+pltw+engineering PDF link annotation
- https://cdn-cms.f-static.net/uploads/4387224/normal_5f9fbcf230eec.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4403413/normal_5f9130df15b58.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4376857/normal_5f92de43c1727.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4368228/normal_5f9e05a33cc9e.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366048/normal_5f91e3d9abaf8.pdfIn PDF document text
- https://nogomikosisodop.weebly.com/uploads/1/3/2/6/132681488/pefifuw_bejejene_fitifotofo_fimalidep.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369779/normal_5fa3c2485bc40.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/35a51f7c-0f64-4ece-b377-3938b54d05f5/jedari.pdfIn PDF document text
- https://s3.amazonaws.com/jozetej/big_piney_wyoming_zip_code.pdfIn PDF document text
- https://s3.amazonaws.com/jadere/jofipafi.pdfIn PDF document text
- https://s3.amazonaws.com/wutezigojuxi/compound_interest_worksheet_8th_grade.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/18eceb01-7e5b-42f7-b498-ef385b5a04db/91324901496.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000b4fb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB4FB	5484 bytes
SHA-256: `ba67c02b54cd534775024b6ff542b14eb2cdb101e6640f150a83bbbd6da5b7d9`
`font_01_sfnt_off0000c7f1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC7F1	14252 bytes
SHA-256: `3d329f8aa9f5eb4ac46cc79651e2bd2e35e778ce67669795c2ba8a0f8f35ef24`

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