Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1291fbacf3ace5b…

MALICIOUS

PDF

39.7 KB Created: 2020-09-30 05:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a71e79986332e4a2f7194bbd7b59d6e5 SHA-1: e3e66a1b8fce0e76baa98c98c5b0a7a927ab8051 SHA-256: e1291fbacf3ace5b917630ccb565a97d2cdfc1157539d42c8272d48f1fc2ff2a
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://cctraff.ru/strik?keyword=catalysis+lecture+notes+pdf In PDF document text
    • http://files.foxmanager.co.uk/uploads/1/3/1/6/131636736/4d61ca.pdfIn PDF document text
    • http://xuget.robertoborgatta.org/uploads/1/3/0/7/130740558/bamisi.pdfIn PDF document text
    • http://wikalowa.sassahr.com/uploads/1/3/2/6/132681443/jitileloxutav.pdfIn PDF document text
    • http://files.amyspetsitting.co.uk/uploads/1/3/2/7/132741144/6971823.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/1/0437/9528/4130/files/59627890454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4760/0807/files/somekarefonedoputar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4392/8726/files/9153890301.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9767/6192/files/kazijaxoxirexoripawisa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35d976e4-6fca-462c-8371-5b20192e67b5/16996260523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7588b2df-2fa5-472a-a25b-e31699830da7/mufaloretakisel.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_off00005dc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC0 5156 bytes
SHA-256: 8cc9fc77adf6e83f431c9f780aa510763c673d37ca9cb1c934d1113aabaf3148
font_01_sfnt_off00006f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5F 10292 bytes
SHA-256: 62b36bda466453845e97330c990a446a91ed43d9098c93bae1dd05a4388bf93a