Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb9e15ce3ee362ac…

MALICIOUS

PDF

39.7 KB Created: 2020-10-01 00:32:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 9334ac38bbf5ba337df8d0e6568e081e SHA-1: ce3451f51e1986cfc32946f0ecb729418ed532d4 SHA-256: eb9e15ce3ee362acf1c0fee05e62bbe8052041d11356b5e07dad104b8cac0a98
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=brennan+barbara+ann+pdf In PDF document text
    • https://site-1039378.mozfiles.com/files/1039378/31204241966.pdfIn PDF document text
    • http://pigox.douxoverdesign.com/uploads/1/3/1/3/131379362/1578940.pdfIn PDF document text
    • http://files.formulastudentusa.com/uploads/1/3/2/6/132695356/bd71239f0e3dd.pdfIn PDF document text
    • http://files.shopparallel.com/uploads/1/3/1/3/131383775/9662272.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/1/0433/4836/1375/files/26313896637.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/0439/5426/files/lujodaginagipidijapeso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/buku_hak_asasi_manusia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9915/9718/files/lopirawadobekazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2977/3979/files/wuromimujirenevakij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a78e412-3ec8-4821-9294-4aae7011ab1b/31254565183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/090a4269-4873-4584-8272-351379c6bbff/19287130414.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7715d1f1-af72-47dd-857f-c44d4a06a05c/90306051753.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f4d5505-fb74-4beb-8d27-01a09f013be1/febonawoti.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_off00005e92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E92 5016 bytes
SHA-256: 810ea800d7531244752dfb3eded404da3edc70ab0a5315d5d27b1ae3d23b7c67
font_01_sfnt_off00006fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAB 10044 bytes
SHA-256: aa297f3c410cdfa8b3b828131641ab4ff824189fc2ae6fd72eb48c63bb5bc5c9