Malicious PDF — malware analysis report

Static analysis result for SHA-256 96384c39c1bf638c…

MALICIOUS

PDF

42.4 KB Created: 2020-10-26 07:03:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 6ad7f4cbf0a774278a293fb479551f5a SHA-1: 8ae166abdcbd4edb1754ef49c0997ca00bb2854e SHA-256: 96384c39c1bf638c21cf764ba212d4b556847de44ffc3849897136b28db1407b
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://cctraff.ru/aws?keyword=advertising+and+sales+promotion+article+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4412763/normal_5f9394faba982.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368735/normal_5f8a456e33950.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/1242677.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/daf8cf307.pdfIn PDF document text
    • https://lokixesope.weebly.com/uploads/1/3/1/6/131607163/6236727.pdfIn PDF document text
    • https://xazojitov.weebly.com/uploads/1/3/1/4/131408465/1865124.pdfIn PDF document text
    • https://pigogokeda.weebly.com/uploads/1/3/1/8/131857695/gamotedumofesug.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/1487408.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/4764905.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006703.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006703.bin)
    • https://s3.amazonaws.com/henghuili-files/89155342682.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/algebra_and_trigonometry_4th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/cerebrospinal_fluid_circulation.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/marcel_proust.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7985/2737/files/civ_6_gathering_storm_japan_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/8886/9055/files/60238827714.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/votileduvatulinaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/beekeeping_tools_and_equipment.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/mupamejikokidasilujexovef.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 extracted file (font_00_sfnt_off00006703.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6703 5524 bytes
SHA-256: 12c1f6c23cc3d1898ee2ded6d08a6e03d29798c52b40cbbab51b159655431f54
font_01_sfnt_off000079bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79BB 10112 bytes
SHA-256: af72828fa594acf1f6a960c0963fedf5315faf1ffc0ae2b17c44148dc84d5b11