Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c33b8bde00114cd…

MALICIOUS

PDF

37.4 KB Created: 2020-11-09 15:55:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 3380350f09c678b23e6b7ced020dabb7 SHA-1: f603befaabefb2a4c7c4a3b0a1543971a79efe77 SHA-256: 3c33b8bde00114cdf4d711c48fe3569a486a1cb9b7055c08f204f410aa4c7541
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://traffine.ru/aws?keyword=tank+multiplayer+unblocked In PDF document text
    • https://lusukukupesakub.weebly.com/uploads/1/3/0/8/130815137/pidupetagi_majitosukefuvuf_kilokezux_gojafe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377377/normal_5f89f57caca16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464070/normal_5fa223860ed3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369646/normal_5f87d58ac38a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390097/normal_5f94de4643f3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390638/normal_5f96035847a20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365563/normal_5f8979d3ca18b.pdfIn PDF document text
    • https://rulomegujenuguv.weebly.com/uploads/1/3/4/3/134329868/ruzidumiwewe_wenesazis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384819/normal_5f9ce6ffb2dbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393644/normal_5fa4ac22a1cf3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/wololuxetesevigi.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/71208052401.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/65570035017.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_off00005685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5685 5296 bytes
SHA-256: 5d1d44d4a64eeff6852bee06b2b00e6b8b0e69949c8e65a6a7388d2b51b78ad7
font_01_sfnt_off00006876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6876 9476 bytes
SHA-256: e126269b7422b4851a5b9d37a16ff628420b93fdbd4fb1c89dccecb794d1365e