Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5c7910fb01d2d6f…

MALICIOUS

PDF

40.2 KB Created: 2020-11-06 21:30:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 269f35597ec7dbaab520e3b55d8c6cde SHA-1: 116f8740912d6e8ead13d7661d605a33ca6b77f7 SHA-256: b5c7910fb01d2d6f60bc6a54806cb1c40d9e91bd46e965aefb1ef3ce64e21708
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/aws?keyword=battle+of+the+books+iowa In PDF document text
    • https://rikisuluwujufa.weebly.com/uploads/1/3/1/4/131452938/df6b3c03550a04.pdfIn PDF document text
    • https://xotukejurivaj.weebly.com/uploads/1/3/4/0/134016857/wozid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448746/normal_5fa0595a81c3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389085/normal_5f93205e32306.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420592/normal_5fa359ab5fb0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367304/normal_5f9de9319cf7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409796/normal_5f95cc491f4d5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://vadazigifexe.files.wordpress.com/2020/11/merozasopegujibe.pdfIn PDF document text
    • https://mufepokupi.files.wordpress.com/2020/11/purunagegutawesogirifug.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/glossopharyngeal_neuralgia.pdfIn PDF document text
    • https://zatejoru847961968.files.wordpress.com/2020/11/72489844693.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_off00005db1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB1 5104 bytes
SHA-256: 1921e97156cd9b572fd28aa834381e28181fd15f11f856fe105a4754ebb0ba12
font_01_sfnt_off00006f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F24 10988 bytes
SHA-256: be35bcee3e2dc2dfa5af6c202a78110de1afab9f8bdf262b8f310fd1c1e26c64