Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c2ab90948df6360…

MALICIOUS

PDF

44.0 KB Created: 2020-11-07 00:00:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 9d5d4316561c2730e9bfd91e2beac2d0 SHA-1: fe7de6b001ab14051e3ba08e091e98978d2be694 SHA-256: 3c2ab90948df63604d29d92cd0ed2e1c728c7be7b695af0ccbd7885c7696e90d
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=full+brazilian+laser+hair+removal+pictures PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385869/normal_5f9844ecc4a21.pdfIn PDF document text
    • https://kelobutino.weebly.com/uploads/1/3/0/9/130969458/6858734.pdfIn PDF document text
    • https://bugusurev.weebly.com/uploads/1/3/4/6/134615575/setezizi_rifijunovejuzo_koxefuveximemu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386613/normal_5f99bdcc040b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393511/normal_5f98160d46e0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390055/normal_5f979657353df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462059/normal_5fa4f0196d63e.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/fasanag/decreasing_file_size_online.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/gogejexis.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/modelos_pedagogicos_caracteristicas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90973fa9-c3fb-4b34-9431-b25c43443efb/32819101387.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/79096699961.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/schema_amplificateur_de_puissance.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/cianix_side_effects.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bb390c3-5686-4652-975a-b29a941bf98e/25346635562.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_off00006c80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C80 5376 bytes
SHA-256: a0851324a51b67bf23b059cf72361c5532b9d6d9e6560a17e900a47a4c41a55b
font_01_sfnt_off00007eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EAA 10624 bytes
SHA-256: 9fa7327855c035a11865b0a432f3008d5441f550d93ed2a1bb213287cf535b71