Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec645c7e8652a47b…

MALICIOUS

PDF

35.5 KB Created: 2020-10-31 10:49:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 6a0596728ee14e5f047751f9e2704263 SHA-1: f45d908a2a026814a5d64093506ab5cddc52f670 SHA-256: ec645c7e8652a47b5f505978c6667bab76a7d54bfa4e55c8025bafbdc60ee4f3
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/aws?keyword=alice+where+are+you+going In PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/wewebunovemerifabo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f9b1a6d6dfd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f87112463c26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386347/normal_5f8f084f55539.pdfIn PDF document text
    • https://xukanimuwuvam.weebly.com/uploads/1/3/2/6/132696198/2327983.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00003f50.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00003f50.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off000073a1.bin)
    • https://cdn.shopify.com/s/files/1/0501/0443/4856/files/gigomixobakawakenedabijip.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/tom_ford_white_suede_body_spray.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/22117675445.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/zewagobubugesikuk.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/57181474569.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 extracted file (font_00_sfnt_off00003f50.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F50 4868 bytes
SHA-256: 5ca44c84c4a17a5074adc3f51d18e0a8ee7f0a46aac16269ea2954f92fbee45f
font_01_sfnt_off00004fd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FD3 10456 bytes
SHA-256: 05bd0cbc925f4895f2289433cc7d210bb682e30596c939e5c24daeb884a0aed7
font_02_sfnt_off000073a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73A1 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f