Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fb68c681fba47e6…

MALICIOUS

PDF

73.8 KB Created: 2021-02-28 12:24:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b3908b10c98dcd3f680f9ca8955ad65b SHA-1: 46d5a3db93313930ef40890acc9599e18fe6b506 SHA-256: 9fb68c681fba47e610c5a2468c859e011a278d7d126c28d0bef45ff155087aed
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://zajinet.ru/award?keyword=are+electrolux+washers+reliable PDF link annotation
    • http://giwosoto.sportsontheweb.net/fifegeposel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469834/normal_5fe35c8795ff4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443356/normal_5fcc999b104ea.pdfIn PDF document text
    • http://medebupima.sportsontheweb.net/74877619565.pdfIn PDF document text
    • https://tabupuja.weebly.com/uploads/1/3/4/6/134647436/fegew_zajokitijuwu.pdfIn PDF document text
    • http://xafopawiki.medianewsonline.com/estudios_biblicos_para_la_vida.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472506/normal_5fdc6ea8db347.pdfIn PDF document text
    • https://cdn.sqhk.co/guzowozuk/jhgceAz/turodakar.pdfIn PDF document text
    • https://penonogam.weebly.com/uploads/1/3/4/0/134012545/kipilulene.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369936/normal_601377cc5e3d1.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/zoluwivebiro/nanoxeb.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/conjunctions_exercises_for_class_8_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/74355038338.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/tokiwujejagi.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/aetna_coventry_appeal_form.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_off0000e569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE569 5176 bytes
SHA-256: f37af9a6f0788f9760d77548146a35c8d59d58b59b897ed9d2fb7cffb4fae1fe
font_01_sfnt_off0000f715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF715 10368 bytes
SHA-256: 7e75d4bec3427c97e5e1e13ca66ecd63ab1a0b2404f904638564c0a2d2f8dc3b