Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc66383ea41d9993…

MALICIOUS

PDF

39.6 KB Created: 2020-10-09 02:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5f8327fac1e15855134fb5abd33d8f71 SHA-1: 771465e8f222800d18da74f8cc944358e13fe990 SHA-256: dc66383ea41d999393e4432868d24e81b324d30153b2534045f048fbfdea7587
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://ggtraff.ru/pify?keyword=brinly+lawn+sweeper In PDF document text
    • https://site-1038898.mozfiles.com/files/1038898/58120985279.pdfIn PDF document text
    • https://site-1044146.mozfiles.com/files/1044146/dibeje.pdfIn PDF document text
    • https://site-1039305.mozfiles.com/files/1039305/tuwomoz.pdfIn PDF document text
    • https://site-1040317.mozfiles.com/files/1040317/zugawama.pdfIn PDF document text
    • https://site-1036861.mozfiles.com/files/1036861/munuxatikilelu.pdfIn PDF document text
    • http://files.anniepercussion.com/uploads/1/3/2/7/132740321/disatibe.pdfIn PDF document text
    • http://tafisej.westhighvikings.com/uploads/1/3/2/6/132680813/5176965c2.pdfIn PDF document text
    • http://gudedu.davidmusgrove.net/uploads/1/3/1/0/131071063/fenolotod.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/1/0430/7812/3669/files/aha_acls_provider_manual_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/3670/0572/files/14955972620.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/8405/4427/files/dodexujabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6235/6885/files/pevipalaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3df8313c-d8c1-4ece-9e44-deb7b0e2529d/sejazewimupapeli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd7ba23b-218d-4133-a912-6dbbe973070c/ziposokubovefagazotog.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_off00005d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D58 5056 bytes
SHA-256: d71e0cb49553adde5e47819a52f566cc9146e7bf59596126ad9494fd27438e3b
font_01_sfnt_off00006eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB3 10280 bytes
SHA-256: 8e42e883640623382c04f9a4c47d0a2d67ad3c2a1ca452f52f977d23669bd529