Malicious PDF — malware analysis report

Static analysis result for SHA-256 65c749e4e199c173…

MALICIOUS

PDF

69.2 KB Created: 2021-05-05 17:46:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 04ffc5a6eec9fc8b1c8b9c689c8038af SHA-1: f7182dad1c7218d4537426591e07fa72e8b035a2 SHA-256: 65c749e4e199c173101f5aef2870d259ad7626fe6332e0d967b7e4fcb3545fd9
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness. No scripts were extracted, but the presence of numerous external links suggests an attempt to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://leonvi.ru/wb?keyword=bergey PDF link annotation
    • http://sikalaporaka.22web.org/kealakekua_bay_guided_snorkel_kayak.pdfIn PDF document text
    • https://cdn.sqhk.co/dunokufimove/eqnlmhd/amenorrhea_adalah.pdfIn PDF document text
    • https://cdn.sqhk.co/pimepojuti/mijuhh2/numopovuwubegu.pdfIn PDF document text
    • https://cdn.sqhk.co/razefudixid/eHhfQge/infographic_resume_template_online.pdfIn PDF document text
    • https://cdn.sqhk.co/tevosenijosu/6m0gjX0/midoj.pdfIn PDF document text
    • https://cdn.sqhk.co/jememobak/YEjcieU/supuxegokejepizabe.pdfIn PDF document text
    • http://zikifogomi.22web.org/susewunoterutilupazip.pdfIn PDF document text
    • https://xitorudabetibom.weebly.com/uploads/1/3/1/8/131856365/rimotejizutopa.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/nCgeig3/how_to_draw_halloween_pictures_cute.pdfIn PDF document text
    • http://nazomomomujo.iblogger.org/gofuvelamavav.pdfIn PDF document text
    • https://cdn.sqhk.co/xamapetarel/oTzT2g1/ralebopefavumifuk.pdfIn PDF document text
    • https://togutugu.weebly.com/uploads/1/3/4/6/134617883/4676542.pdfIn PDF document text
    • http://zakukamupavi.22web.org/soramesosutamisijixekik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415951/normal_602111741d395.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455179/normal_5ff5088c7de35.pdfIn PDF document text
    • https://cdn.sqhk.co/xerejijasoma/bhjuPom/wuzadif.pdfIn PDF document text
    • http://wadupobem.iblogger.org/interview_kerja_bahasa_inggris.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://verekoxamokit.epizy.com/how_to_fix_weight_watchers_digital_scale.pdfIn PDF document text
    • http://fukutinupamebo.rf.gd/96398066391.pdfIn PDF document text
    • http://legolipif.epizy.com/gokidemipo.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_off0000cf71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF71 6168 bytes
SHA-256: 75234fed6bbabc20d414e78397cea2c27fc1266b4606ac77c274f67865fa0fde
font_01_sfnt_off0000e465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE465 10356 bytes
SHA-256: 5b5ba58a28512bce8816baad7887009552478727dc567598c8b64764e0c76ca3

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