Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8bbde9af392a4e7…

MALICIOUS

PDF

72.2 KB Created: 2021-03-04 11:36:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 6ea8a756d39bc21803bb6bde3c98d175 SHA-1: 9f6c798c69d3375eab6e8dbde0d296f55768d19b SHA-256: f8bbde9af392a4e7a217bb81bb01b6fc3fd55d030be438406d077f3c812af034
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary URLs, 'https://pelibifir.ru/123?utm_term=what+channel+is+news+now+fox+on', suggests a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://pelibifir.ru/123?utm_term=what+channel+is+news+now+fox+on PDF link annotation
    • https://pudasebedizut.weebly.com/uploads/1/3/4/5/134587980/10b34311.pdfIn PDF document text
    • http://davorivugexawu.sportsontheweb.net/cost_of_a_g5.pdfIn PDF document text
    • http://biwuwevurax.22web.org/catecismo_de_westminster_comentado.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/30234692844.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451574/normal_6038ec5d82d78.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/blue_jeans_software.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/rapewofumenovidirotewaxix.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/toyota_camry_xse_v6_hp.pdfIn PDF document text
    • http://fefisapuvekebi.epizy.com/coordinate_plane_worksheets_grade_7.pdfIn PDF document text
    • http://lumosaneja.onlinewebshop.net/is_there_a_winning_strategy_for_roulette.pdfIn PDF document text
    • http://zatupux.rf.gd/3154048578.pdfIn PDF document text
    • http://kakarares.epizy.com/58014224796.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/27181583531.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/77295335727.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/automation_studio_5._2_64_bit.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6DF 5048 bytes
SHA-256: cc0983ce227fe982329f730cf152493d7da72f00f64867179afe8c3fd9fd6935
font_01_sfnt_off0000d829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD829 10764 bytes
SHA-256: 6978699306a401f2c8fd679d6465ef46325a8c30d39bce87ea8e8f327a74bb06
font_02_sfnt_off0000fd02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD02 16444 bytes
SHA-256: 5e4aed171a43c64c4ae7ae574eab4067b8a4f85b7f7fe81d301311861029fd88

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