Malicious PDF — malware analysis report

Static analysis result for SHA-256 c47b66657a92698c…

MALICIOUS

PDF

42.4 KB Created: 2020-11-07 07:46:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: a16e447a03f4f33e5e8d807af2b2c7cd SHA-1: edaa69de9de064c88d0f118bc12f07228aa836ae SHA-256: c47b66657a92698cb75b402b9e3f449ab35b9e1efd3ad8720e03ab5b5c9ecd4a
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://traffking.ru/123?keyword=element+of+drama+according+to+aristotle In PDF document text
    • https://zavomafig.weebly.com/uploads/1/3/4/3/134356936/78a51f9.pdfIn PDF document text
    • https://sojejizewo.weebly.com/uploads/1/3/4/4/134460985/13cc0aa0a.pdfIn PDF document text
    • https://kazajiti.weebly.com/uploads/1/3/4/4/134456981/1533132.pdfIn PDF document text
    • https://zififawatef.weebly.com/uploads/1/3/4/3/134384507/tuxugigarojal.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/2c78a1d9-3890-45da-8ef0-154bac2945f0/natorekudijuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/343c8d51-829f-4103-ae3a-a9e726c5bf90/juvutatedufozet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6df9daf5-da46-400f-80f4-8c46d311bba2/68171332978.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a9d6b92-92ca-4426-a519-e51586ed3f1f/rorikumi.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/61200919211.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/79485037553.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e090fcec-b5c8-45c7-aa15-81b37b18c6dd/dibil.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_off00006807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6807 5296 bytes
SHA-256: 6cef2be0557dc97f3d29d078faa5fa3c77215fb2e828e3bb26c4331231349fb1
font_01_sfnt_off000079f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79F8 10184 bytes
SHA-256: e0b92eb77e565e2eaaa52c9adc1cc4958d97f61654b6bcdf23dea947f86b46b4