Malicious PDF — malware analysis report

Static analysis result for SHA-256 38a6fdada2c9b6d2…

MALICIOUS

PDF

42.2 KB Created: 2020-10-06 13:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 027fe88f304153860b10dd71742393a6 SHA-1: b863c4c40fcbf805cde676a953f499cc60fa73e3 SHA-256: 38a6fdada2c9b6d2efb0e68b5d410f614a6638b3f60354aefa426a7b508f25d9
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://ggtraff.ru/strik?keyword=optoma+s341+projector+specification+pdf In PDF document text
    • https://site-1036684.mozfiles.com/files/1036684/6619456896.pdfIn PDF document text
    • https://site-1043791.mozfiles.com/files/1043791/67844860999.pdfIn PDF document text
    • https://site-1041777.mozfiles.com/files/1041777/poxebape.pdfIn PDF document text
    • https://site-1038402.mozfiles.com/files/1038402/85766227575.pdfIn PDF document text
    • https://site-1037215.mozfiles.com/files/1037215/tadinagobeb.pdfIn PDF document text
    • http://files.openmindfashion.com/uploads/1/3/1/4/131438899/8b754.pdfIn PDF document text
    • http://files.chashin.store/uploads/1/3/1/1/131164519/1c8c188d.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/1/0484/1927/4906/files/90366741216.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/0059/0246/files/getesafizixodet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9671/7977/files/74079484420.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/4422/7230/files/guitar_output_jack_types.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7977/0019/files/68833985593.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3765/4178/files/stark_jegan_vs_kshatriya.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8158/0188/files/nusuzego.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0470/7491/files/79659410669.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_off00006579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6579 5676 bytes
SHA-256: d64177e56cbdf4a85d5474285e8bcff2f89d4b130afadc579c5a82e7906da482
font_01_sfnt_off000078bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78BD 10204 bytes
SHA-256: 2505608618eb5721dd33c73b00767ad3bdeb45a20947ccb3c3cc723dcc0714cf

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