Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b1e149c1f811b62…

MALICIOUS

PDF

68.8 KB Created: 2020-10-06 14:11:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b10a5693ce1c37db3ac2d4c71bc2f7ad SHA-1: 32bac5563aca73d634c2b113dfbaac5da02ddb1e SHA-256: 8b1e149c1f811b626df4db4f432bd1cbbcf9d26256a798068421500260c16c88
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=75+books+removed+from+the+bible+pdf In PDF document text
    • http://files.clarewilds.com/uploads/1/3/1/4/131438501/dbbc3627cb3.pdfIn PDF document text
    • http://vubixezu.eugeneysantos.com/uploads/1/3/2/7/132740405/koburosobowelojor.pdfIn PDF document text
    • http://files.bayoubegonia.com/uploads/1/3/1/6/131636584/mararosakexiririlulu.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/1/0499/9692/3040/files/xogukofimanokebepasataka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2612/2405/files/gamenelatorul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9779/2420/files/18740981268.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0471/0678/5430/files/corpus_hermeticum_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4574/6838/files/oregon_current_fires.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1388/0483/files/cosmos_episode_5_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7128/2586/files/ivue_tv_guide_not_working.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0094/7103/files/56944652452.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7342/4548/files/94826692728.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6290/2438/files/35493773248.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_off0000c98a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC98A 5444 bytes
SHA-256: 89512de90838c2ae8ad33195651b0ea03dd5003a7097536a05d620f9171de555
font_01_sfnt_off0000dbf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF6 12716 bytes
SHA-256: 93767ef74e954d8f107465103accca8de45b0f960e869bf38b76533d55c2c204