Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5846b9369ff2333…

MALICIOUS

PDF

40.1 KB Created: 2020-10-10 20:17:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c30b05c119a978a5f21a9f3173bf7d98 SHA-1: e4c8f3b08b92d43cb13e6131081ef34a70eaf6a4 SHA-256: b5846b9369ff2333dbf5879d3202231d4b55c4ad68ec3f58a5c6e9bbdb2c4374
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://ttraff.link/pify?keyword=6+pillars+of+character+examples In PDF document text
    • https://site-1041579.mozfiles.com/files/1041579/papidujidurubi.pdfIn PDF document text
    • https://site-1037233.mozfiles.com/files/1037233/rojigolexi.pdfIn PDF document text
    • http://files.hupu3.com/uploads/1/3/1/3/131398432/tujewifezajiwaxonu.pdfIn PDF document text
    • http://files.karamagreenhouses.org/uploads/1/3/0/7/130739755/6721441.pdfIn PDF document text
    • http://files.ellenjohnsonsirelafcorruption.com/uploads/1/3/1/1/131164419/4a210ac.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/9f453b89-3e8d-4041-81a2-485146761371/3536059219.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1712ef8c-de39-4642-b1da-81e7f1c8792f/57126622411.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e04f8c0-fd0b-4dcc-965c-39318a53bdee/97757059646.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7139d9a5-0e7e-4150-8b3d-d046ea49d161/gujuzime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2135098b-5af7-4e8c-bc53-122fe8c50f7d/pijafiroxuvetatopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c03a01eb-7c24-4c6c-a719-3be7503ee789/10863394855.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38134a8c-eec5-4e5f-8698-77cc7e3f2969/kojuxomafuwadij.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_off00005f8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8C 5384 bytes
SHA-256: 67bfd4f7cf7e4cdca0e57e4f499b3daea4a012d60c02391fb9f19d79dee538be
font_01_sfnt_off000071ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71AC 9984 bytes
SHA-256: 58a623fb263fd96c57ae36414b57a9f1a1433ef18709d0334531ed15ddbe58cd

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