Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cabff8a7b104147…

MALICIOUS

PDF

72.3 KB Created: 2021-02-19 01:08:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: eb76bacb0a28336932b5e061b67979f2 SHA-1: eef5ff9e82f2d3056c6023456823184864c5ac73 SHA-256: 6cabff8a7b1041470d333742ce5b51fc859a8c2bd1e6eb455dc62eb85b43f728
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/wix?keyword=bola+tangkas+gratis+bitcoin PDF link annotation
    • http://grizhoff.ru/60338001787paeoq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465386/normal_5fcce713cd0e8.pdfIn PDF document text
    • http://voiprormul.xyz/59257148988o55o6.pdfIn PDF document text
    • http://fresh-ita.fun/6801507322thev8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530070/normal_5fc65e6a03cf8.pdfIn PDF document text
    • http://berabujadew.22web.org/xafixakan.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/dc20db82390c.pdfIn PDF document text
    • http://idealicacolumbia.site/vuratiritavofaferivemofn5vuc.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/jifesu/darufemojikezamiloma.pdfIn PDF document text
    • http://togipumenotu.epizy.com/76646971652.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/gadek.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/zelda_ocarina_of_time_rom_n64.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/adoption_papers_uk.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_off0000d8ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BA 5220 bytes
SHA-256: 1f85ab03332cd190059110d02e84b873d55fefa56449803d84bc2036eefbe125
font_01_sfnt_off0000ea95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA95 13076 bytes
SHA-256: 6f735a7204906939e092b9101d964ef15683c604003132b24f0371f2caf58251