Malicious PDF — malware analysis report

Static analysis result for SHA-256 1545fd0e9d407ed6…

MALICIOUS

PDF

45.1 KB Created: 2020-10-26 04:51:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 730c8efd037a5ccc9e032b6b169559a6 SHA-1: ee0ef90729e459bd344614b4ef4a4409615f31d5 SHA-256: 1545fd0e9d407ed6a9421854877e401a351d3448df123b3b3e550034dc0ed1ab
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/aws?keyword=meditation+for+beginners+book+pdf In PDF document text
    • https://nalabusapigo.weebly.com/uploads/1/3/2/7/132740218/kosafisijikadas-siwomegilewi.pdfIn PDF document text
    • https://fotobuwab.weebly.com/uploads/1/3/4/3/134368258/dipaku.pdfIn PDF document text
    • https://sonefuvik.weebly.com/uploads/1/3/4/3/134325549/zejokomaj-nutogapi-zijilalaxugi-kubig.pdfIn PDF document text
    • https://kutolimog.weebly.com/uploads/1/3/4/4/134435461/fejiwomesuguke.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/dusexuzemezej.pdfIn PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/fososolixij.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/188e41.pdfIn PDF document text
    • https://jonipafatanepa.weebly.com/uploads/1/3/2/7/132741476/bd8cd2d7.pdfIn PDF document text
    • https://kufazijofiw.weebly.com/uploads/1/3/0/7/130776126/wejum_daratoruw_lunoriko_vipuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369928/normal_5f958082e5010.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366045/normal_5f96110f85a72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f87028c91605.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f922b94d4624.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379221/normal_5f8c62355fa52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380395/normal_5f8ebda77bb3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388619/normal_5f94215aef8d8.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000714a.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000714a.bin)
    • https://s3.amazonaws.com/henghuili-files/35760196143.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/sociocultural_anthropology_a_problem-_based_approach.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/hong_kong_attractions_map.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/well_being_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/ielts_academic_speaking_questions_and_answers_filetype.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/59845571190.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 extracted file (font_00_sfnt_off0000714a.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000714a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x714A 5384 bytes
SHA-256: 30c26eb9faba9a5f305c27c6071d3eeeeb2b9e054a84344d6330092b4418c7cc
font_01_sfnt_off000083b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83B8 10544 bytes
SHA-256: 5ce722b32969a930fb9b2d6757dd4ff3eaafb4bc6ed93006cb71b8defd5b3e30