Malicious PDF — malware analysis report

Static analysis result for SHA-256 dce8ad1e5aef0a18…

MALICIOUS

PDF

72.4 KB Created: 2021-02-27 11:30:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 91194aac64bb726c1a3e5461159d7a5d SHA-1: e2f9e7d3ca09a97f040bf4966f1f521ffc7a68c1 SHA-256: dce8ad1e5aef0a18bda115757878ee4d321193d0b8844cb97687fce960b4a160
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/award?keyword=descargar+diccionario+espa%25C3%25B1ol+ingles+gratis+para+pc PDF link annotation
    • https://govotewimodiku.weebly.com/uploads/1/3/4/6/134649218/fcd7b7.pdfIn PDF document text
    • https://tuxativavowaz.weebly.com/uploads/1/3/1/4/131437956/wolufivojifog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465396/normal_5fe731b0041f9.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/where_does_it_say_in_the_bible_that_god_gives_us_free_will.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421944/normal_5fec48e896e60.pdfIn PDF document text
    • http://vipimuxatomefi.medianewsonline.com/paint_by_numbers_framed_canvas_uk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451229/normal_5ff48c5404f2b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384030/normal_5feca00f53904.pdfIn PDF document text
    • http://zonizubiro.getenjoyment.net/el_santo_rosario_meditado_dia_jueves.pdfIn PDF document text
    • https://bosupazalo.weebly.com/uploads/1/3/4/4/134473359/960f74d13e3.pdfIn PDF document text
    • https://kusonanozeko.weebly.com/uploads/1/3/0/7/130775507/c506968884c.pdfIn PDF document text
    • https://kunudixi.weebly.com/uploads/1/3/4/6/134667289/vuzirisitu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369648/normal_5fc6736b8f690.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luvoxijamubisur.rf.gd/26078781250.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_off0000da3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3F 5452 bytes
SHA-256: f3e7cddd0b285e742164e9a7a4eac85472459a01e234b576cb7219a49b47f3a4
font_01_sfnt_off0000ec9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9F 11436 bytes
SHA-256: 9bd797156f8e7032df1ce447183a88cc6cbb24b840bb16b7c5a9ce123c9aede3