Malicious PDF — malware analysis report

Static analysis result for SHA-256 99e5ceefbeb63988…

MALICIOUS

PDF

68.7 KB Created: 2021-02-13 09:47:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7556cd223733b3b0e49f1d9b503ba14b SHA-1: 4e4e7ee7611fa69acaeec01788c96f0998ea5974 SHA-256: 99e5ceefbeb6398877e64298b300561585f27187ad599e2ccc62d6d8c1361808
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wb?keyword=backwater%20blues%20form PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475196/normal_5fd2d1176f48e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387036/normal_601fcd400d56a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393020/normal_600ccac7ed536.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410975/normal_601d94cdda59d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368976/normal_6006a6382c982.pdfIn PDF document text
    • http://mizusugazalu.22web.org/95199626216.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463560/normal_5fdc6164ed7e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385030/normal_6003d3009fcb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375698/normal_5fc6669c5ace6.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/Iu3gjgg/slingshot_price_2015.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390328/normal_600976c35e1a6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://regigaxuwejizu.epizy.com/in_custody_report_kootenai.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/40918227609.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/58033029221.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/41657893634.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_off0000cfc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC8 5372 bytes
SHA-256: 175d5613b0f2bc2872dbe3f0a5f358edc3193430aeb2acaa39c250ebdd0abdb0
font_01_sfnt_off0000e213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE213 10580 bytes
SHA-256: cef8d5d7d835cfd858125079901fc96a70aee5f0f4f65116d8e7d0ff9890fb29