Malicious PDF — malware analysis report

Static analysis result for SHA-256 aee0c3a08be66bbd…

MALICIOUS

PDF

60.0 KB Created: 2020-10-03 12:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 7c46067593af64ead4b769fa29924f9e SHA-1: 52dc93e0c15e62803134d6a0860fbc7018a42dd8 SHA-256: aee0c3a08be66bbdb22801acf60b8b26dbdc3c0d92802f73482a99c328955a55
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://cctraff.ru/strik?keyword=utilitarian+theory+of+ethics+pdf In PDF document text
    • http://tikir.iphoneonestop.com/uploads/1/3/0/7/130738720/2972429.pdfIn PDF document text
    • http://files.monitheseries.com/uploads/1/3/0/9/130969085/manomiperixowob.pdfIn PDF document text
    • http://files.southernparkandplay.com/uploads/1/3/1/6/131606255/6119285.pdfIn PDF document text
    • https://site-1037222.mozfiles.com/files/1037222/tevux.pdfIn PDF document text
    • https://site-1036745.mozfiles.com/files/1036745/perosakufelategexotuzater.pdfIn PDF document text
    • https://site-1036743.mozfiles.com/files/1036743/vojujujevixote.pdfIn PDF document text
    • https://site-1040041.mozfiles.com/files/1040041/tusagipofofobuzon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3608/1308/files/2272133508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3767/1075/files/kino_der_toten_guide_bo3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4211/1637/files/petadenun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1055/5041/files/77225032073.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/2999644951.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a1da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1DA 5124 bytes
SHA-256: 70f6e229d73fc9fc65a0705755b6b3e49bff8a2d7a7cf4c07b519f4503f98bc6
font_01_sfnt_off0000b33b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB33B 9956 bytes
SHA-256: babb3a6e1b7f718cba0eb947f29baa8301a86a059082ffdc2dd996a88a9f92aa
font_02_sfnt_off0000d51d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51D 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361