Malicious PDF — malware analysis report

Static analysis result for SHA-256 628a22bea40c2704…

MALICIOUS

PDF

65.8 KB Created: 2021-03-11 02:54:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 25451364aaaf74e59b9e0b6bc677f85d SHA-1: 68b898b9970559e91457b9065780f3ac490fc3c1 SHA-256: 628a22bea40c2704d5b5cb0bdbaa447352f8942492107dcf1eca594ba4ebfc95
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://maypoin.ru/award?keyword=headway+beginner+fourth+edition+pdf PDF link annotation
    • http://theharaka.online/what_do_you_mean_by_human_development_class_10kgba4.pdfIn PDF document text
    • http://setofexperience.site/eduardo_galeano_open_veins6dye8.pdfIn PDF document text
    • http://zefujixa.mywebcommunity.org/jebujugolamelolorenivete.pdfIn PDF document text
    • http://mamefumiwuto.mywebcommunity.org/65086537168.pdfIn PDF document text
    • http://cosmosqrab.online/gixoluvevepaduxipv4zs.pdfIn PDF document text
    • https://varozifan.weebly.com/uploads/1/3/0/7/130740200/30e3a0e.pdfIn PDF document text
    • https://wifevotus.weebly.com/uploads/1/3/4/8/134897576/354c0bc4194e.pdfIn PDF document text
    • http://itclick.info/23126927124trec1.pdfIn PDF document text
    • http://jepisafidezegun.scienceontheweb.net/jixabegepez.pdfIn PDF document text
    • http://basagutidabe.sportsontheweb.net/ziwoxojibidovan.pdfIn PDF document text
    • http://sneakerspapa.store/84349256324qyqg0.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/zugutixe/giziwaxawijizotokukikogut.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/13644911020.pdfIn PDF document text
    • https://s3.amazonaws.com/filidabut/62871430499.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/biochemistry_basics.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/10812876296.pdfIn PDF document text
    • http://jowosos.myartsonline.com/aprendizaje_basada_en_proyectos.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/mezugoratena.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_off0000c5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E0 5388 bytes
SHA-256: 669b0ccd7b2a86cc0bad05a57bffd61c5072f5b3ca60feb09debbe800289d072
font_01_sfnt_off0000d843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD843 9828 bytes
SHA-256: e0738c20e6237e38ae2dd3063de868652bde17172f7bac9a03e746494ec048c7

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