Malicious PDF — malware analysis report

Static analysis result for SHA-256 d95db32923492b16…

MALICIOUS

PDF

35.6 KB Created: 2020-11-09 16:08:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 123901aec56f1575525ad7eb9b41300e SHA-1: 4978d49515858e7b10d2ed257f769d3c351ba886 SHA-256: d95db32923492b16d7fc90705044fd2900bdac1d001970962c8ce4b66c4b5936
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://traffking.ru/123?keyword=puppy+surprise+90s In PDF document text
    • https://cdn-cms.f-static.net/uploads/4450733/normal_5fa0cf0f7db57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408336/normal_5fa0c2172c4bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374533/normal_5f99b69c3f656.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416934/normal_5f95ff6901346.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369909/normal_5f9dd09594c7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368759/normal_5f90d9e0118bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413966/normal_5f964b846cf81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402718/normal_5fa8dc03896ab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fokena/36635331371.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/25530986427.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/15278655978.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/morning_afternoon_evening_in_spanish.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/31723164484.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/jasuko.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/topuxiputizobesed.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/79793860739.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_off00004d71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D71 4972 bytes
SHA-256: 89194665f4b8cc6f34926d4661c9fc25dd9d97aa7bbf345c852b53282b436d40
font_01_sfnt_off00005e70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E70 10324 bytes
SHA-256: 466c79eea88e5386b06f68713bb8ec149ec89cb05934562444430c0e08a4a29e