Malicious PDF — malware analysis report

Static analysis result for SHA-256 b65ffd7c3718bbb1…

MALICIOUS

PDF

49.7 KB Created: 2020-10-06 10:18:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: c5fbda95d6a4eecd410ce4020324e570 SHA-1: 6865646551b6e9e79efafcc4698cb623c7a0d749 SHA-256: b65ffd7c3718bbb1e9a5f07075d252dcd029854dbcd6fb5368fd5a8436c5bda0
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=neuvaine+a+notre+dame+de+fatima+pdf In PDF document text
    • https://site-1039817.mozfiles.com/files/1039817/wiwanipalupudimudinopip.pdfIn PDF document text
    • http://gepijuvov.sp4climate.net/uploads/1/3/0/9/130969744/lofurisuwakogutevo.pdfIn PDF document text
    • http://files.brightbrigands.com/uploads/1/3/0/7/130775825/42540d23a.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/ddf7c263-8c2b-4ed4-ae16-28b38f150b0b/88672443019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f73b724-8a44-46bb-aaf7-340cf503507b/47990351674.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b294873b-8295-4e94-8d3f-32bdd56b52ae/zenumuluveliw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e06991a0-afb1-4841-954a-b20d81fa2aeb/20687582380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed5d75e1-105d-4385-9a86-35c66bd84aec/woxasuperemogivivalinil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1de02ab7-eb6d-47da-acff-aeb48bb76c59/joganixerezak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51c4db27-0020-4a9c-ba4b-bd20bead89f8/waxekumimonumutus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bd898ca-c286-4928-95f4-8a2031b1440a/padonilisopare.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_off00008213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8213 5004 bytes
SHA-256: 63e531561b8fc2fd6a443d08b9cf0949971dfbedfb3f4c5a78e7354a6b2c6a87
font_01_sfnt_off00009315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9315 11928 bytes
SHA-256: e5f521554a60c9f817b1b40fd50fa1e6652002b1b7270d275923de67b7b7de38