Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7475a2355cd7dfc…

MALICIOUS

PDF

42.7 KB Created: 2020-11-07 03:48:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 639c9149f1d07fedc8de5f492bbd402b SHA-1: b61121197f4958a8bbb6f1d8f704cadc12ae7db2 SHA-256: a7475a2355cd7dfc818c471877f057e72f60a7341727daa546bc1570d5776479
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://traffine.ru/aws?keyword=nuwave+party+mixer+blender+parts In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383300/normal_5f969b5a24b99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408879/normal_5fa2a4e9135a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369922/normal_5f897947d3f03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367905/normal_5f8e8cf862ec4.pdfIn PDF document text
    • https://jigaxamika.weebly.com/uploads/1/3/4/6/134610035/xowutebafidevige.pdfIn PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/9377631.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377912/normal_5f8a8be56b0aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411273/normal_5f9eba614eadb.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/wonoti/reglamento_interior_de_la_auditora_superior_de_la_federacin.pdfIn PDF document text
    • https://s3.amazonaws.com/tabobujimo/ley_organica_de_la_administracion_publica_federal.pdfIn PDF document text
    • https://xoxedoxiki.files.wordpress.com/2020/11/c_v_examples_for_first_time_jobs.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_off000059d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59D6 5308 bytes
SHA-256: 5a285f5a254fea4b156daf2b3fc0673896a4c59426f2a374dc4742b359dacc2c
font_01_sfnt_off00006bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BDC 10692 bytes
SHA-256: b392b9309bf7cbf50418da93492f9e7b27d33bebc530d0bd23ea54ac08c71dc5
font_02_sfnt_off00009037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9037 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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