Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a5ecbc7f5ab3a47…

MALICIOUS

PDF

61.3 KB Created: 2020-11-07 20:39:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: af901cf07cc1d631c69e8a245ff20dda SHA-1: d9fa21cd0b9fa00b7f41b2d37135e7694036c523 SHA-256: 5a5ecbc7f5ab3a4724e8b4e9450e83630896c3a37bfd33c0256ca88274daaa55
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://traffking.ru/123?keyword=manga+messiah+pdf In PDF document text
    • https://xavoxoxuda.weebly.com/uploads/1/3/1/3/131379246/nasunilo.pdfIn PDF document text
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/wigomedinazokana.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387814/normal_5fa2e5799c1cf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://wepizitu.files.wordpress.com/2020/11/66331733151.pdfIn PDF document text
    • https://vadazigifexe.files.wordpress.com/2020/11/gopiv.pdfIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/distress_tolerance_skills_dbt.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/porofazeranufepe.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/sin_city_2014_123_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/gikanutejadebu.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/73267867923.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/13104340151.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/kadutazexem.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/mr._yuk_poison_control_stickers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7806273c-ef08-47a5-8a53-616e7bc25a82/anycommand_universal_air_conditioner_remote_manual.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000767f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x767F 12960 bytes
SHA-256: 27933cec81ecbbebf644f57a1809a88dea52b7d2a1d1a5319acccdcb6e1dbf37
font_01_sfnt_off0000a087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA087 5332 bytes
SHA-256: b95bfe19e58b045dbff1a6c284b08a91942ba20435f8758746e0c71fd637620d
font_02_sfnt_off0000b297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB297 11280 bytes
SHA-256: 0fa58cab10b75e5bcd06b02f39852c098fa8a6df7d0a20d88ebeac9c39898e89
font_03_sfnt_off0000d88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88C 6084 bytes
SHA-256: f5fe2de525700542684e23a11f1cb185b9ffab030677c6a48f3d5a1088c9e53b

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