Malicious PDF — malware analysis report

Static analysis result for SHA-256 26340bf05ce4455e…

MALICIOUS

PDF

56.7 KB Created: 2020-11-06 23:00:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 64c02484020df7714d256d851ebf6f43 SHA-1: e5149e53c5a2d89607a229c785fae6c137215ebe SHA-256: 26340bf05ce4455eaff824549ea8aee2cc19c4d065215ab6ea96bd091b9d656d
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/123?keyword=tmnt+price+guide+figures PDF link annotation
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/xumilulefiva.pdfIn PDF document text
    • https://katubebadidi.weebly.com/uploads/1/3/4/4/134474785/gazagasilu.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/2672066.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/12d2ffc0-8c4e-486c-ba60-9ede1d340601/pamabugikoribofokebudux.pdfIn PDF document text
    • https://filejemebake.files.wordpress.com/2020/11/auxiliary_verbs_worksheets_for_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/13167063380.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/24684478305.pdfIn PDF document text
    • https://sizixef.files.wordpress.com/2020/11/90261814298.pdfIn PDF document text
    • https://dugifene.files.wordpress.com/2020/11/2003_volkswagen_jetta_manual.pdfIn PDF document text
    • https://konomalipu.files.wordpress.com/2020/11/vupezidomobifowawatanug.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/netabamoteg.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/amazon_flex_gift_card.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_off000095e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95E2 5184 bytes
SHA-256: 165d37132ee6403a67ae6b9d3e264f0adf08a511022f182c65be7a3b8996e48d
font_01_sfnt_off0000a774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA774 17500 bytes
SHA-256: c5a11e09693513380975fd73802410a7fe606df6cddb8767a65d845dd4bf4c44