Malicious PDF — malware analysis report

Static analysis result for SHA-256 c03a8df002516936…

MALICIOUS

PDF

58.2 KB Created: 2020-10-12 02:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 82b024bbf4a754f28b29ca8bb4831a69 SHA-1: 7862fa8164653a75920af930a331bf5d3eced2b5 SHA-256: c03a8df002516936b40e986b4aefc8e322694c07d789c69cec1d6a38928428fc
174 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not 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://ggtraff.ru/pify?keyword=bim+handbook+pdf+espa%25C3%25B1ol In PDF document text
    • http://files.pleasantvalleyfmc.org/uploads/1/3/2/6/132696104/7891016.pdfIn PDF document text
    • http://files.mayflowerimporters.com/uploads/1/3/1/6/131637255/zikofuwapali.pdfIn PDF document text
    • http://vuvofesov.forceofnaturehandhewnconstruction.ca/uploads/1/3/1/6/131637291/gebijagej_lapipobemupa_zuvedulo_vovujevejozu.pdfIn PDF document text
    • http://rulefife.caitlin-cannon.com/uploads/1/3/0/8/130874368/735b392217b3.pdfIn PDF document text
    • http://files.miamisburgladyvikingbasketball.com/uploads/1/3/0/7/130775649/jonotig-vupazuxu-kozepilupiwuder-rewalewuwofobo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2286/0956/files/viromikukikizokemu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1302/7486/files/90112266993.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7a148b9-2372-4607-b30f-cdc9a3dd2463/pudugogixeseja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ead6a96a-d0e9-476b-9b6b-9cf763afda8b/69126339840.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11821d96-90e8-47be-8ddb-07dc93a73d18/96004967622.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_off0000a238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA238 5648 bytes
SHA-256: 8e77a0fdf0c1ecd7c3a0c53881b7cf7c6b3949de7434af7ddec0d2e020f865cc
font_01_sfnt_off0000b503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB503 11152 bytes
SHA-256: d3d5b9f33f5fd4563d84220959931eafc40ed6ce2a0f6a6de8f048c5118e8719