Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dafa9ea8c6355fc…

MALICIOUS

PDF

70.4 KB Created: 2021-02-05 23:19:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 7c0067c7c4a9ae547f475f93fcd04bea SHA-1: a3874a534d87cd00b032e20fcd8438edfeaa7876 SHA-256: 1dafa9ea8c6355fc022850e64a9212c9f4b42ec6e2535fbc43b70a8811e338f2
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/123?utm_term=clases+de+numeros+naturales PDF link annotation
    • http://lastasked.com/81150147276rjnsj.pdfIn PDF document text
    • http://yandex-delivery.cc/7092299226fp00m.pdfIn PDF document text
    • https://cdn.sqhk.co/lezebulodiw/hjjfLjd/tesepagozesarubevalobe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388842/normal_5fd914af8d639.pdfIn PDF document text
    • http://vatasefapulik.iblogger.org/all_coastal_landforms.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448750/normal_5fe7e8e0e4312.pdfIn PDF document text
    • http://kulofokugizadeb.22web.org/gapulofutularisafef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451736/normal_601d6af695d9d.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/tixedujegibex/electric_circuit_worksheets_grade_9.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/the_beginner_s_guide_game_review.pdfIn PDF document text
    • http://nolepukopele.epizy.com/fish_dichotomous_key_worksheet_answers.pdfIn PDF document text
    • http://lafebevu.rf.gd/linkedin_company_banner_template_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/free_google_slide_presentation_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/niwoso.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/scrabble_2_letter_words_list.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_off0000d57e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57E 4876 bytes
SHA-256: 9e166db762945f37b870e605e6b9cc11734acd5755d510a7f6211617350b422b
font_01_sfnt_off0000e5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F2 11596 bytes
SHA-256: 5ba1326a4712b2858989692769f123f1dbd738319c6e5bf522bad5da1e780f07