Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec5237facbae3303…

MALICIOUS

PDF

71.8 KB Created: 2021-02-16 13:41:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 354ee534e07470d00ad77c26e29940c9 SHA-1: bec93a4534da1eae2d898a4d40e89c747d3e3f7b SHA-256: ec5237facbae3303992675cfebc9ee439c9cd99976d9bf56d73b3ecce271166c
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/wix?keyword=house+escher+necromunda PDF link annotation
    • https://bewimowijukoja.weebly.com/uploads/1/3/4/5/134584545/1967c5baea6.pdfIn PDF document text
    • https://gawajofanobovap.weebly.com/uploads/1/3/5/2/135296378/runaresimozenax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372087/normal_5fd14d4ab86e9.pdfIn PDF document text
    • http://classicalnaturally.com/catia_v5r20_documentationyjhsv.pdfIn PDF document text
    • https://zuberexuwaxif.weebly.com/uploads/1/3/4/5/134501439/2ca80ea9e43.pdfIn PDF document text
    • http://losinglotterynumbers.com/wafoposisenupoguw8146f.pdfIn PDF document text
    • http://fuwenosod.iblogger.org/rarenedizizabivij.pdfIn PDF document text
    • http://ogranicbio.space/fundamentals_of_python_first_programs5bhao.pdfIn PDF document text
    • http://xuvivok.22web.org/cnc_turning_machine.pdfIn PDF document text
    • http://detonic-hypertonie.website/55995009826eju68.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/lunojol/childhood_obesity_ielts_reading_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/batiku/code_documentation_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/business_english_vocabulary_with_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromisixinolib/2nd_line_us_number_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/92500651958.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/jekuvuwomenalunosawufote.pdfIn PDF document text
    • http://tubupokus.rf.gd/google_slides_templates_free_cute.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/medosiwavokaxebifibut.pdfIn PDF document text
    • http://rasuvum.rf.gd/bumedilofukebigipikodoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/pazaje.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/chhattisgarhi_gana_song_free.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_off0000ddbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBB 5108 bytes
SHA-256: dee165d0b7a547f7c7ea5daec08a79bab7ab5d6a9c4cd7043b3f710bfed61e71
font_01_sfnt_off0000eee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE6 10392 bytes
SHA-256: f185d39d3f8a2e8d81a08594c3f7e848ee2d74395101f19609a44768a22ae14c

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