Malicious PDF — malware analysis report

Static analysis result for SHA-256 c24bf7e3998ff48e…

MALICIOUS

PDF

68.8 KB Created: 2021-01-26 09:01:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ef18fea534b7cd4a77b9f818b0b77d70 SHA-1: fc9f260141e4146aa1f7cc23b362a93ccb5d3c9f SHA-256: c24bf7e3998ff48ed79e790b1248999d91d84555c181728fd2d8435e9a4bda90
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jottigo.ru/wb?keyword=definicion%20de%20matriz%20foda%20segun%20autores%20pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4402710/normal_60038482800c0.pdfIn PDF document text
    • https://teregurejojexol.weebly.com/uploads/1/3/4/8/134879353/juzenuk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368762/normal_5ffe2420d51af.pdfIn PDF document text
    • https://gaxasexafarud.weebly.com/uploads/1/3/4/5/134590452/9810424.pdfIn PDF document text
    • http://opssmall.space/872168509841jgvk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413850/normal_5fffa42b9c2b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411219/normal_600f42e03b99e.pdfIn PDF document text
    • https://mebijanuwirat.weebly.com/uploads/1/3/4/0/134042853/foniserij-sibabofutid-xapiwaso.pdfIn PDF document text
    • https://cdn.sqhk.co/sabimejuka/jijh9xI/ping_pong_3d_table_tennis_academy.pdfIn PDF document text
    • https://cdn.sqhk.co/dubagelojuwe/gifjcwm/translate_english_to_russian_letters.pdfIn PDF document text
    • https://siwuxamafovad.weebly.com/uploads/1/3/4/4/134489720/wagokuwolape-wexiwawol-pivusidiw-bugixovov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421615/normal_5fea32b4baa2d.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzomorikat/hjmhcKd/kixuzufa.pdfIn PDF document text
    • https://vesabigixovo.weebly.com/uploads/1/3/1/8/131857304/2b80dc91.pdfIn PDF document text
    • https://cdn.sqhk.co/pekobenew/cjcjggg/wonderland_table_runner.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cf77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF77 5492 bytes
SHA-256: 69071b818482e09e28de5a8ff4b70eeb994fce55f5f501aec3ac4fe6e1773de7
font_01_sfnt_off0000e21f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21F 10628 bytes
SHA-256: e9ff5e8289913382d88648550e8657addeab9f100f568c6d3b3b819de93ac926