Malicious PDF — malware analysis report

Static analysis result for SHA-256 908abcd162b9041b…

MALICIOUS

PDF

40.1 KB Created: 2020-10-05 22:43:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 59eae6ef22e628ca5485cd42a312beef SHA-1: 9344f931534ee6d4c43e1aca6edd9f2bfbf4e9bc SHA-256: 908abcd162b9041b23cb6c36bf060b906c41ba23b4618f07706165dee8b06c4f
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=power+vs+force+hawkins+pdf In PDF document text
    • https://site-1038506.mozfiles.com/files/1038506/48213869187.pdfIn PDF document text
    • https://site-1037054.mozfiles.com/files/1037054/71323642337.pdfIn PDF document text
    • https://site-1037149.mozfiles.com/files/1037149/viwufemunijal.pdfIn PDF document text
    • http://files.centralhighgrizzlyband.com/uploads/1/3/0/8/130874025/wopofe.pdfIn PDF document text
    • http://files.alloriefeekes.com/uploads/1/3/2/7/132741352/6e37bd247e891.pdfIn PDF document text
    • http://files.propcustomz.com/uploads/1/3/1/8/131858287/pekipuj-pabamup-morepifav-kisedopuve.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/d19dd212-7d08-4aa7-ab22-c5fd8d99aac0/wajununogiraxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d61a437-6a46-4138-9829-8df501961125/wifesir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29b79263-deda-4d26-a075-a6a94631f018/75626920580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19929fac-c760-4fcb-ac7a-dc4a2881bb72/rikalufagutoxoneg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5656bd8e-ab4c-460e-8878-494c2e0a3b50/77311028438.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ee30d12-cced-4ea4-85c0-a5acdb0d3e4e/wisiluje.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_off00005ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA4 5428 bytes
SHA-256: 4c612f3df131e2f3f766f894f06501fa55e6fca0722d7190c66084cf43a35936
font_01_sfnt_off00007136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7136 10128 bytes
SHA-256: 5c00512524f8f8e741f457656b7905bd1ad0b4bcd3a9e845d6e7b86a5fbc752d