Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8fe94ee0405fa4a…

MALICIOUS

PDF

71.6 KB Created: 2021-02-16 05:55:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 10cb4df0f7f5564ffae2ce2f68ebd75d SHA-1: 4625d50a97bd7aa67cbc40db7f3364906c93d188 SHA-256: e8fe94ee0405fa4ac48b80498521dc03b69204afcfbf552e07c4c641ddb661ab
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/123?utm_term=how+to+make+mark+sheet+in+excel+2007+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383912/normal_60136897ca2bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454824/normal_5ffca4f140b2f.pdfIn PDF document text
    • https://cdn.sqhk.co/vixivizal/jblifYT/85410613354.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451210/normal_5fded880811e1.pdfIn PDF document text
    • https://cdn.sqhk.co/modajili/P0WZEic/tovugezira.pdfIn PDF document text
    • http://5coupons.info/adobe_reader_apk_for_windows_phone0cloq.pdfIn PDF document text
    • https://cdn.sqhk.co/wixefawoz/gg5asjc/sejosevusagababuxama.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/94jguhg/ship_tycoon_strategy.pdfIn PDF document text
    • https://rimuzomidaz.weebly.com/uploads/1/3/4/3/134353295/tubizomunini.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/norozovijalu/49166703842.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/53137462721.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/73313163568.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/45783777588.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/41757794270.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/amman_songs_telugu.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_off0000d650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD650 5936 bytes
SHA-256: ff7729eb3e74931fb4c50c71666d84573b7ac84efec9ab6ee684f0b31324c09f
font_01_sfnt_off0000ea73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA73 11356 bytes
SHA-256: 077667567b763f603c850bc64b508db5f515bc527913cb69cb24ec1db37b7b94