Malicious PDF — malware analysis report

Static analysis result for SHA-256 473a521605d61f8c…

MALICIOUS

PDF

44.1 KB Created: 2020-10-22 13:04:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: da077e296ed0deef9817de9b87664d87 SHA-1: d2fd214ae7782078019a262393d26e3b2f2ddba1 SHA-256: 473a521605d61f8ce9fa7f118d1466dd6af774ac9712687a201b6a9792b08cc8
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=the+street+ann+petry+sparknotes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_5f8718ef7dd91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_5f8c1acbb24f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5f89a96b2f62d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381756/normal_5f8c3f4ba81ea.pdfIn PDF document text
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/665c0.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/7854898.pdfIn PDF document text
    • https://gepobuxew.weebly.com/uploads/1/3/1/0/131070920/nusazog-bazamela.pdfIn PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/3136970.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/5281532.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/3cb113af6.pdfIn PDF document text
    • https://kufazijofiw.weebly.com/uploads/1/3/0/7/130776126/saliz.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/mijedusovineti/mewewawilajatafi.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/suxewosib.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/kubenerabilatamidoganunen.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/68413717957.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/13085518047.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/administering_medication.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/67137479076.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/53885190368.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/accounting_conventions_and_practices.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/bufedaki.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F69 4988 bytes
SHA-256: 4020cd7ff27a56ad7f7c135be535305ac18861ea64390923b7d80469ef2463a3
font_01_sfnt_off0000805f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x805F 10104 bytes
SHA-256: ff563b27e407e5903378b03662050379df6fae58df7b4e83abab63b5a9d935a1

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