Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e41a30ad04c42b…

MALICIOUS

PDF

49.3 KB Created: 2020-10-01 13:49:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 889c6c8cef1af3b92f1f1cc49cf17c04 SHA-1: 33cdde590fb1e22309623b733edd7d5f0eca9eff SHA-256: 26e41a30ad04c42b7421c79acb89ec50092be5509fa1bd984dfb28974bc3529f
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://gettraff.ru/strik?keyword=analog+oscilloscope+vs+digital+oscilloscope+pdf In PDF document text
    • https://site-1036699.mozfiles.com/files/1036699/74053442982.pdfIn PDF document text
    • https://site-1038503.mozfiles.com/files/1038503/47783570171.pdfIn PDF document text
    • https://site-1037865.mozfiles.com/files/1037865/konininodagufikikofu.pdfIn PDF document text
    • http://fukekol.catherinemmsmith.com/uploads/1/3/1/4/131482993/b1cee5.pdfIn PDF document text
    • http://dorazejo.wildfirefitnessllc.com/uploads/1/3/0/7/130775379/238be.pdfIn PDF document text
    • http://files.gabrielagamez.com/uploads/1/3/1/3/131384432/8214899.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/1/0430/8641/3985/files/riwamenavifiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/berkshire_encyclopedia_of_world_history.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6177/1430/files/69890882922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/pharmaceutical_biotechnology_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4394/6649/files/94054051301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/6671/2218/files/74365486350.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/4364/6614/files/chapter_17_section_1_italy_birthplace_of_the_renaissance.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3410/8323/files/define_plastic_deformation_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2511/2988/files/65528491918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1706/0007/files/zurarikepumipikedunuxujup.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_off000082ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82AD 5276 bytes
SHA-256: ebc3b492db77abfdc84d2921ea9eb0045703e123f5749bb855ad730ad763b053
font_01_sfnt_off000094c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94C5 10312 bytes
SHA-256: d8b1378be3597d388fe59da0e843544ac8c21c2babf96deb9b0b7162e7ff8a09

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