Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba8523eb45f6179a…

MALICIOUS

PDF

43.5 KB Created: 2020-10-03 12:51:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: a0e974f4ace2c39ba2c708496e19623f SHA-1: 086ee1c8b55219c90d077cd5ac4109f57fd27563 SHA-256: ba8523eb45f6179a25c032786070c900f5997dea3cab6d33dae2ac096d387147
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/pify?keyword=ham+radio+go+box+ideas In PDF document text
    • http://pazadexo.harvestharrisburg.org/uploads/1/3/1/3/131379540/kaxole-pawekakipufa-bugamoxaw.pdfIn PDF document text
    • http://jitibev.iodenewbrunswick.ca/uploads/1/3/1/6/131637279/2180147.pdfIn PDF document text
    • http://files.evilgeniusentertainment.com/uploads/1/3/2/6/132681295/cf8b7aec3c8.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/1/0433/5468/5599/files/88239000177.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/6061/1240/files/the_three_estates_of_french_society.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7732/1379/files/star_spangled_banner_chords_key_of_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0949/8536/files/overlord_volume_11_google_drive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0123/2035/files/nibedivezobefexiwuzaxoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86a91d2f-a55b-4c7d-948e-fc250a632ce3/tuwet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/213cee35-dd39-41b5-8a61-bf1fcb115dde/96977834574.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/872ad8d5-ff8e-4422-96b2-2c312360164f/49090950398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b17b139-67cb-4471-9517-b0bc5457d9b1/97576451750.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f474e14-8840-4eb8-8c70-d461c0325df3/tuxiromopazobaf.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_off00006c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C36 5284 bytes
SHA-256: 5675fae8f4994e247a73d5ccdccad63642b39bf2b28b80b284176bb5d8af5477
font_01_sfnt_off00007e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E11 10284 bytes
SHA-256: 9b1650503ca4c9ac39091dafb6c4907de1901ad4f74903879dbd36ac2816083c

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