Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2a185554f58f7af…

MALICIOUS

PDF

42.2 KB Created: 2020-11-05 16:06:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 053ba265c51b4f998d95b7de04ac3a3e SHA-1: ddba3c46c94057b890c043bf89870e96088bee46 SHA-256: b2a185554f58f7af0173b5d00df0e390cb17949da61f8bbc697f135034817c41
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://traffking.ru/aws?keyword=local+hot+springs+ar+news In PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/7360136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379035/normal_5f93a916d00f5.pdfIn PDF document text
    • https://nabutamu.weebly.com/uploads/1/3/4/5/134525390/nifapop-tevix-xidolepu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/neduxovuk.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/59793777348.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1cc299c-80e9-4328-b393-017e6f166a88/34376970996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8de6cc25-077b-43f4-a236-6aa7c2139110/kijegidadixejowudivuruzow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a42c83f-3341-43b0-b6d0-e8430349213d/9101018169.pdfIn PDF document text
    • https://s3.amazonaws.com/lodunixodetum/soil_formation_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/wii_black_and_white_display.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/65613705540.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f098d160-ebe4-4dbf-9bc8-297273021fe5/75364563735.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_off000066e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66E9 5228 bytes
SHA-256: 6a1f3650098e46b824a87e47d07b16486e89278ef9d2cdb151f2ab5d9abc8118
font_01_sfnt_off000078c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78C2 10448 bytes
SHA-256: 41b48e288bb9172a793f35643980f033a5c89200e55240bb4078b722f5d45df8