Malicious PDF — malware analysis report

Static analysis result for SHA-256 3908dec913fdeeff…

MALICIOUS

PDF

95.1 KB Created: 2021-02-15 02:01:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: baf7693d9d2fcd0433fd7a3fb7d68e60 SHA-1: ce8c2970f03556bd4401cc3f3bf7186d0facd450 SHA-256: 3908dec913fdeeffe5b7279932b40b06e38d0bfe05a1d5bbb196d371347f3d47
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://maypoin.ru/wb?keyword=achalasia%20treatment%20guidelines%20uk PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4474979/normal_5fc7e4b1cbfcc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417413/normal_5fcd7ad05fba2.pdfIn PDF document text
    • https://wijodemarivupi.weebly.com/uploads/1/3/4/8/134861972/9c5d7df.pdfIn PDF document text
    • http://tufilevazoropiz.iblogger.org/zinigetufujowaxuvon.pdfIn PDF document text
    • http://dusexixegiseves.iblogger.org/ultra_high_performance_liquid_chromatography_ppt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478146/normal_5fdad6504a87a.pdfIn PDF document text
    • https://nivujetomut.weebly.com/uploads/1/3/4/7/134753784/sejosujawizuk-bogip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486351/normal_5fdd76419a8bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495262/normal_5fffde87ba21b.pdfIn PDF document text
    • https://tagakokiginozol.weebly.com/uploads/1/3/0/7/130775172/720111.pdfIn PDF document text
    • https://puxodemidumez.weebly.com/uploads/1/3/5/3/135345879/5872988.pdfIn PDF document text
    • http://xazivigufimu.22web.org/3533059011.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459058/normal_5fca42799f3a6.pdfIn PDF document text
    • https://wiguvizokon.weebly.com/uploads/1/3/0/7/130776253/53499048a6a5709.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gusalixofunek.epizy.com/euphoria_movie_parents_guide.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_off000138c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138C1 5408 bytes
SHA-256: a8cee459fab7950a4e02566d7724b1e78ca16363104a17cb917c860d6996acf7
font_01_sfnt_off00014af3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AF3 11032 bytes
SHA-256: 0720c5e54cee3d918ffceba82a5f81ddaddf9de526ea08397fde7d0d137ebf20

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