Malicious PDF — malware analysis report

Static analysis result for SHA-256 818b1bcf0ae06916…

MALICIOUS

PDF

72.3 KB Created: 2021-02-02 11:28:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 39b57d3781d86f33468b9e9bc1ab12c7 SHA-1: b6599b95c87aa08d10e189e26973b870f5393832 SHA-256: 818b1bcf0ae06916418f9c69c061b714b67a553ff75b94b1fcbcc0685202df11
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/123?utm_term=san+diego+medical+examiner+death+records PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4403262/normal_5fcf1becad44b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479921/normal_5fdf360953b5d.pdfIn PDF document text
    • http://nomanodix.iblogger.org/35884133059.pdfIn PDF document text
    • https://cdn.sqhk.co/tijovomiv/eJjc1gj/vemusajoridiwuwusaxapofi.pdfIn PDF document text
    • https://cdn.sqhk.co/mebozesilo/MkgPTia/mizurevuwikirozu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486200/normal_6012e1f69269e.pdfIn PDF document text
    • https://cdn.sqhk.co/vaziworab/ggjXL4S/56094791298.pdfIn PDF document text
    • http://kizijele.iblogger.org/bikifipubagedipalaxote.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/xotomisen/tizuvitaworamimofoxituzix.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/pokemon_let_s_go_eevee_guide_walkthrough.pdfIn PDF document text
    • http://regigaxuwejizu.epizy.com/faperivowifumel.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/detatezi.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/bed_sheet_storage_box.pdfIn PDF document text
    • http://xubixetumed.rf.gd/supply_chain_management_in_apparel_industry.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/agenda_format_for_event.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_off0000dae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE2 5524 bytes
SHA-256: 2db2d6841ea45b0486f0d8fd11d7371f37df6d4ade11c8b7ea84449fb242ebb0
font_01_sfnt_off0000ed83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED83 11516 bytes
SHA-256: d9f92e2488efe9734a9ee4f90f9f6692f2ba8bbca7e7a5697c7b29db4686ea8b