Malicious PDF — malware analysis report

Static analysis result for SHA-256 1803160c1f6b73af…

MALICIOUS

PDF

43.0 KB Created: 2020-10-01 00:28:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: d378d791dbaf3613bcbe06cc168407ec SHA-1: 57cd5025fce1796857e6412aefc0c4e3541ed79b SHA-256: 1803160c1f6b73afa8548690330c803252c514e348ba803cd0fe9c379c5e2241
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=quimica+inorganica+exercicios+pdf In PDF document text
    • https://site-1037245.mozfiles.com/files/1037245/51769554654.pdfIn PDF document text
    • https://site-1037073.mozfiles.com/files/1037073/25508001984.pdfIn PDF document text
    • https://site-1038323.mozfiles.com/files/1038323/68787745678.pdfIn PDF document text
    • https://site-1039487.mozfiles.com/files/1039487/bitabokuwaxulobixanoxoro.pdfIn PDF document text
    • http://files.pureclassgeelong.com.au/uploads/1/3/2/6/132681342/mokaj_xanakagixa.pdfIn PDF document text
    • http://files.newparanormalinvestigators.com/uploads/1/3/2/7/132740343/zovabamenitoterog.pdfIn PDF document text
    • http://files.jilliancanavan.com/uploads/1/3/0/9/130969723/pekezigubibesa.pdfIn PDF document text
    • http://files.hallfamilytherapy.com/uploads/1/3/0/8/130813100/c0215c.pdfIn PDF document text
    • http://mubamizug.seeyoudowntheroad.org/uploads/1/3/0/8/130873930/23c18b2e27d3.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/1/0432/8967/3888/files/bitmap_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/9630/4803/files/bonded_labour_act_2016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0328/4128/files/mevusizopipolatimileloxik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/1673/7183/files/begureveduzuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7710/5832/files/47656168686.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3400/8987/files/23513983532.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2688/9374/files/sistema_de_coordenadas.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_off00006886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6886 5572 bytes
SHA-256: 68abf4b6758759255f2ed06591ec2410f9925364eccbdc6525bfdff1ca213c24
font_01_sfnt_off00007b65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B65 10400 bytes
SHA-256: 4a0206dc36f8f4f9688a1f99cb00076dc8310c0463272ca54d730d4ca4351227

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