Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f3c9e041d66dbec…

MALICIOUS

PDF

48.6 KB Created: 2020-10-28 19:20:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: fb92cdba5ec803c4fa3c898860523cee SHA-1: 787e7a313d50f84c2164ff0262c3045f8f4de2a0 SHA-256: 2f3c9e041d66dbec73643190700df67e20890a4c896cb056ece05ee224d1330a
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://gettraff.ru/strik?keyword=outline+for+police+brutality+essay+points In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413243/normal_5f945336c7dd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382189/normal_5f98cf767e1a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369168/normal_5f928625d7a08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386609/normal_5f9061b0a7ae7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387427/normal_5f91977233296.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369919/normal_5f97638b56e24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367961/normal_5f93e06f2c60b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379722/normal_5f98f3b420248.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365602/normal_5f86fe9e0e6ac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sukobogixe/rurevafedonu.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/possessive_nouns_worksheet_grade_6.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/baixar_creator_1._2_1.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/chuyn_file_dng_nh_sang_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e675c47-ad73-4666-879d-7f07211bfb62/55395703641.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/24869561322.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/1768528357.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/84186355978.pdfIn PDF document text
    • https://s3.amazonaws.com/mewezekilafef/sister_wives_divorce_update.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/lean_bronze_certification_practice_exam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94e118fb-dd3a-41b4-91b8-6e949c4bbdf0/17408668120.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000722b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x722B 5160 bytes
SHA-256: e6061eefdbef8b618aa57a7e9af822a4208081a09bca8516a3c67f82ac73a403
font_01_sfnt_off000083c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C5 10796 bytes
SHA-256: cc80b426c73a1a187966dc7e3b90ca01d20f294c3151170b7f7d6a0f4aaed0d3
font_02_sfnt_off0000a6da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6DA 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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