Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8267ebaf2bb6a4c…

MALICIOUS

PDF

34.6 KB Created: 2020-11-08 03:45:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: d5048da3cebc557281d9db72f782b7dc SHA-1: fa7f670e99fb73adb6420b40f051cd9c41b43a85 SHA-256: b8267ebaf2bb6a4cecbae6f9265177c1ad6c42bb50cac4c3f6edfc236241f149
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://traffmen.ru/123?keyword=sift+heads+act+2 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366362/normal_5f8f8f8ed675f.pdfIn PDF document text
    • https://tajudazu.weebly.com/uploads/1/3/4/3/134328852/zubegotubume-gabuwavelufop-pumujarodu.pdfIn PDF document text
    • https://jopizogado.weebly.com/uploads/1/3/4/3/134317888/wopemubiri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426545/normal_5f98737f54e0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5f883f90cc462.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/distributive_property_equations_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/parelilosogolufule.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/scales_and_arpeggios_piano.pdfIn PDF document text
    • https://fadedilujof.files.wordpress.com/2020/11/light_her_fire.pdfIn PDF document text
    • https://pufelaneniw.files.wordpress.com/2020/11/melene.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/2.1.6_majority_vote.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/what_does_active_capa_mean_in_italian.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/kukavuzezalin.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000400d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x400D 4788 bytes
SHA-256: 810f073fd8432e989d6a5eb2dfd1c8ddc38ba4956a77639a2ad84073f72ed992
font_01_sfnt_off00005053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5053 9332 bytes
SHA-256: ce6a6837be6fe6c7b226f5a1068bc684286da3d3978944d91172f64aac0b66c8
font_02_sfnt_off0000701b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x701B 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3