Malicious PDF — malware analysis report

Static analysis result for SHA-256 93281af2b0d03988…

MALICIOUS

PDF

56.2 KB Created: 2020-10-01 21:13:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: df7cef4b21d5561cc7c0bec1902fd87c SHA-1: 14a68912e7e9ab9e8b44261c0f977b9c8976ae36 SHA-256: 93281af2b0d03988e8e1d03f7f6c4eca3a7305c8a02772f684694fdd1f5aa99d
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=chlamydia+trachomatis+pdf+2016 In PDF document text
    • http://misafu.joyomancy.com/uploads/1/3/0/9/130969707/69743226.pdfIn PDF document text
    • http://files.manifoldwisdom.org/uploads/1/3/0/8/130874253/439821.pdfIn PDF document text
    • http://jegukike.sbartiststudio.com/uploads/1/3/2/6/132682555/veradu_vufegizedase.pdfIn PDF document text
    • http://lapaguk.clkdesign.ca/uploads/1/3/1/3/131379103/rijosarijamef.pdfIn PDF document text
    • http://sesodal.royalsgardencenter.com/uploads/1/3/1/3/131383621/nubabu.pdfIn PDF document text
    • http://files.homeandgardenelegance.com/uploads/1/3/0/8/130814387/kesopu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2089/4886/files/music_business_research_topics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1048/9496/files/winding_trails_camp_registration.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5789/5831/files/zutoleneta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9392/3742/files/51525155327.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/1548/7655/files/88359032418.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2965/4435/files/benefit_guide_templates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4038/2882/files/zofukedibegifijowawuwez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1556/9060/files/my_hero_poem_point_of_view.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5823/2480/files/gold_inca_snail_dead.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 2

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_off00009b39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B39 5884 bytes
SHA-256: 97bb917a19b7f29375de352f58812162d441825354c1e6e88d6f41d9c7e58960
font_01_sfnt_off0000af1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF1D 10804 bytes
SHA-256: ca3f538c66a1f0d939225dbc05a6c24e4f6bdb52da7679fff19fbd273486d0fc

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