Malicious PDF — malware analysis report

Static analysis result for SHA-256 6232398e6543b6a3…

MALICIOUS

PDF

43.2 KB Created: 2020-11-08 02:01:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: cd777db4026ccebceb42c2269b855c3b SHA-1: a53be7e167ea558a2237fc9ede9e02e4fd2fa859 SHA-256: 6232398e6543b6a3647c137ea02ac8c62040b27c6ce7028462498dce9469f9ac
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=music+notes+chart+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380525/normal_5f8ca01651cbd.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/monirafulowafix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424696/normal_5f9e9630353b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368955/normal_5f8f610f1513a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376866/normal_5f92cf632986c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/19cf0b9e-2bbb-4f1d-a039-ce923c071136/58418464266.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/655ca15c-cb81-4815-8b89-5d400305e3f0/degifusofubone.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/89772396395.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/equivalent_expressions_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/tuwomemibune.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/pokmon_xd_gale_of_darkness_multiplayer.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/avon_ct_schools_news.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb691ef3-d534-49b3-be38-f816882e9d8e/15989134979.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a5c391b-6642-4801-baff-976a904901c9/galovomodut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f8d8775-826b-4a12-bdce-5bba0570f91a/38053133118.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_off0000679a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x679A 5216 bytes
SHA-256: 1b337f65a73b6cfe8e0f812790415de8d8ceb15a271e6c3343a68ed7ef041cae
font_01_sfnt_off00007962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7962 11400 bytes
SHA-256: 3250a50d6a48277bd42d55e13fbe5f7a824fed9f90c771c18ae0445293420253

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