Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2220280b5fb0b6…

MALICIOUS

PDF

50.5 KB Created: 2020-11-05 22:38:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: eb6df6428267f5644b87fa206948fbaf SHA-1: 0d2a29fc681955a9f667e51fdf955d4dc5207d5c SHA-256: ab2220280b5fb0b6d58739d17b68eff0888c4121d3f96ca59ff56ec1217f769e
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/aws?keyword=synergy+pitsco+education PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401712/normal_5f9965ad76899.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366664/normal_5f873aad2ef1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379987/normal_5f8c4852ce9e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368760/normal_5f8df9f0be16e.pdfIn PDF document text
    • https://fikifiwokadekaw.weebly.com/uploads/1/3/4/5/134585034/bb767b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406789/normal_5f9b01fe95cf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409602/normal_5fa031d909042.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368505/normal_5f9c03ab9b6a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409395/normal_5f968f8228571.pdfIn PDF document text
    • https://kelipibefis.weebly.com/uploads/1/3/4/5/134500531/kifutovo_linig_juvilizowenape.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376870/normal_5f9765f93dc9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404740/normal_5f952bfccc67b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401989/normal_5f9746fb254b8.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/gajabedafot/rudadine.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/32347771337.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_off00008673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8673 5416 bytes
SHA-256: d3e5df961bcf50a67bb0b66c374fb9bf432a9fdcaed070e6f57f52cdac0f1abc
font_01_sfnt_off000098fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98FA 10712 bytes
SHA-256: 9fa65794b26a471a83efe8bcc55912d344c0a9be3224ee038a8193566d756528