Malicious PDF — malware analysis report

Static analysis result for SHA-256 e36c23d087473fe3…

MALICIOUS

PDF

44.4 KB Created: 2020-09-18 12:08:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8490b60a403fb132ea0874d42866b20b SHA-1: c987ec1af55ad625ef9909eac26ff24cc52c2e37 SHA-256: e36c23d087473fe30a3511d9212c898a29cd8d778c4f66016175eacc652dde70
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://ttraff.ru/wix?keyword=mineral+makeup+worksheet+%25232+answer+key In PDF document text
    • http://files.dubaistyle4ever.com/uploads/1/3/0/7/130740323/8c10c8ed31.pdfIn PDF document text
    • http://files.jlepta.com/uploads/1/3/2/6/132695360/6d48adbf.pdfIn PDF document text
    • http://files.dianefelicejewelry.com/uploads/1/3/0/7/130775001/gexoxuze_samurepigurukuz_kadixusu_pegifezazam.pdfIn PDF document text
    • http://voxurajup.ancient2new.com/uploads/1/3/0/7/130776394/2566145.pdfIn PDF document text
    • http://gogoz.soilandforestryservices.com/uploads/1/3/2/6/132696021/63e1d38ccd1e32.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://04887092-b80a-443f-becf-d792c8b26317.filesusr.com/ugd/4fea5c_20bbba6f57ad40039437791dbec1ee9e.pdf?index=trueIn PDF document text
    • https://5e4c8d5d-918b-4c7d-a3c0-3f7546f5b7a5.filesusr.com/ugd/89b1bc_49163b58e264441e977d01c495d54c4d.pdf?index=trueIn PDF document text
    • https://bbf489a3-b87a-46ae-ab00-add269c04b6f.filesusr.com/ugd/a421e3_e597ae4388ea4857bdaf270990526480.pdf?index=trueIn PDF document text
    • https://68f1ba7f-bbb1-4199-b555-1181fb9cdda9.filesusr.com/ugd/61567a_0204b92c51d44e29b7a1c458b5118ca3.pdf?index=trueIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7183/1193/files/52323692412.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/teviligesumepefuvo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1055/5034/files/39033161087.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9232/8102/files/botany_of_desire_full.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/81352779814.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9870/5572/files/voguwamasetutideben.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5883/7142/files/1-_99_cooking_guide_rs3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9756/6616/files/bemalemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0472/2914/1157/files/baxakeket.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_off00006f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F16 5220 bytes
SHA-256: dea0688080cc948841698d0d62350dea4b2d5dd0704dbec4468b58b7a0532386
font_01_sfnt_off000080c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80C2 10412 bytes
SHA-256: 52891741bb783b660aee45c1955c845508eca0ac919844565a3fb15c0686799c

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