Malicious PDF — malware analysis report

Static analysis result for SHA-256 18b5b4cd68f6d840…

MALICIOUS

PDF

73.1 KB Created: 2021-02-13 00:46:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 622d46366ec3d8d74a85734d9072f86e SHA-1: 6daa2c46cfac7f6a028ced2f78314dba94c24a9c SHA-256: 18b5b4cd68f6d8401439e503087b1007f83d9c87d66ecec3fa99adf77480c3ca
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=figurative+language+unit+4th+grade PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4448137/normal_5fcd55d99a83b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381289/normal_60258f5dc6b9d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365619/normal_5ffe4850b3d31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407299/normal_6025363945f2b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478933/normal_5ff582c4de02f.pdfIn PDF document text
    • http://womans30planet.com/dexuguvupuzolusukd98k9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417037/normal_5fcf93f231806.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381102/normal_5ff2d63ee9d0e.pdfIn PDF document text
    • https://cdn.sqhk.co/wijelukifap/Pii8jcN/spinning_two_fidget_spinners_at_3am.pdfIn PDF document text
    • http://banepudota.iblogger.org/pusib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417309/normal_5fdb2d10644c3.pdfIn PDF document text
    • http://jijagigipijum.iblogger.org/gojaxunu.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/sugowubuf/big_city_adventure_game_app.pdfIn PDF document text
    • https://s3.amazonaws.com/satudifin/shia_labeouf_rob_cantor_sheet_music.pdfIn PDF document text
    • http://jowesokawebape.epizy.com/ireport_not_starting_windows_10.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_off0000e1a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A5 5012 bytes
SHA-256: b0c404aaeb353211a19cc2768d05b6030e989102a9c6783c15a95c2e311af6ad
font_01_sfnt_off0000f2ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BA 10876 bytes
SHA-256: 54512e6f9e19a5f1cdd26965ea035d79231cc11334b443e3ebc073676b0277d3