Malicious PDF — malware analysis report

Static analysis result for SHA-256 c66a0b840f3b6d64…

MALICIOUS

PDF

40.2 KB Created: 2020-09-30 19:17:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e003946f99fc5a7b3967a8aaf1b0e057 SHA-1: 801c55ce4d8fd42d6e2b043e0d11eb34dfbed159 SHA-256: c66a0b840f3b6d64d96cb17bf236455ada9641c1bd37883772ebbdc63765f160
142 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ggtraff.ru/strik?keyword=business+environment+in+india+pdf In PDF document text
    • http://files.nashvilledebateleague.org/uploads/1/3/0/7/130740517/8651c.pdfIn PDF document text
    • https://site-1036629.mozfiles.com/files/1036629/96842239758.pdfIn PDF document text
    • https://site-1036981.mozfiles.com/files/1036981/7899934262.pdfIn PDF document text
    • https://site-1036719.mozfiles.com/files/1036719/munor.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/da2dd3d3-0330-4914-b7c3-df2a96c3b8af/45298526739.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6874c77-912b-43af-9d1b-c8aaa7e920be/1566456591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3d32d8e-abf6-47cc-ad63-6af0e8ed0cd4/41877299120.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af0514d5-2e46-4a60-911c-8525bed0d3dc/mowipoderukaruruwuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f920c2d5-77f2-4759-b1fa-f2f0402bfd24/wajiloma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3051/9716/files/7162366753.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7854/1722/files/gerefazetorunuza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/8292/3431/files/86967306292.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1883/0503/files/3184430299.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5322/7932/files/25_inch_extra_deep_pocket_fitted_sheets.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_off00005f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4A 5264 bytes
SHA-256: 8fd4becc044a912e1138ab1ec7a35d2e13a85b33abdfa5b236d36807129cc284
font_01_sfnt_off00007121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7121 10324 bytes
SHA-256: 238c7d6a940ab302cc36a1d3dada82ffa5cebd84b1b39d4d41e7b13c86b481ab