Malicious PDF — malware analysis report

Static analysis result for SHA-256 87c1e0d3b1a9e520…

MALICIOUS

PDF

45.1 KB Created: 2020-10-05 23:01:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 574fbcc2814465701c42ba79f2ec1b84 SHA-1: 3307d9b157099048808daedb34746d0deee2d085 SHA-256: 87c1e0d3b1a9e520b6fb56d53894aefa73a7aed64fbe2125e8d0672828ae453c
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=cultural+hybridization+pdf In PDF document text
    • http://files.theimagodeiclassicalacademy.org/uploads/1/3/1/3/131379541/d425dc237.pdfIn PDF document text
    • http://files.fcbcweaverville.org/uploads/1/3/0/7/130740429/sofujana.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/3031119c-9b49-4496-9789-8bd05030e890/24136534636.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/531109b7-56fd-4d2c-9c04-55e25b282cc8/wenawud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01b1afba-1058-4f48-bb9b-bbf29af089ae/65588655263.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/273879a4-6ac7-4d59-8d8c-e1322ae01fa8/zirojawixole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f10c7d7f-0769-4386-816d-bc293acb086c/6050976859.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a99bda8-56b5-476b-bba4-0186afdd6a4e/vonixabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40f13850-cda4-4c95-8e15-74f0d229b1ef/30305097650.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccbeac2f-a6ef-4c9b-8d2c-0579fd76db9c/96344133559.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e098fdf6-7e59-42f0-8d29-6569df543543/linisitanogapop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a73535f-560b-4a6e-8ed2-001fd801dfb6/gorugokodesoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b71bd470-366a-4181-9350-23d3b037565e/17148824629.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4D 5148 bytes
SHA-256: 53d3034c94bf327aedc071bee0dbe091e59b09fb718c64c2e066836285831b64
font_01_sfnt_off00007ccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CCD 13552 bytes
SHA-256: 8d190c1aeec2c3f84f4ec50370dbe19f8aa8348dc5904631792e973a55a28231

Open this report in the interactive analyzer, or submit your own file for analysis.