Malicious PDF — malware analysis report

Static analysis result for SHA-256 f22ac95ca86bac40…

MALICIOUS

PDF

69.1 KB Created: 2021-02-12 05:09:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 99c0422fc99d855819ac2ada01267390 SHA-1: 1c1828b1ac3e34d07f0932644c793de1c93c95e9 SHA-256: f22ac95ca86bac4020f9f370e45c736df49198c2e00414424e3ed82cebe79bcc
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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.
  • 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://baarspo.ru/wix?keyword=how+to+trade+warframe+2019 PDF link annotation
    • https://gubepukabo.weebly.com/uploads/1/3/0/8/130873841/nezusego_namizijitigalak_jikupivupadasu_kedusex.pdfIn PDF document text
    • https://mipigonegomef.weebly.com/uploads/1/3/0/8/130813466/bozexoxuto.pdfIn PDF document text
    • http://fokefetebebinin.66ghz.com/conference_room_booking_excel_template.pdfIn PDF document text
    • https://fiponadokimikub.weebly.com/uploads/1/3/1/4/131437640/jemom-pubefimonetir.pdfIn PDF document text
    • https://sajakuzotile.weebly.com/uploads/1/3/1/0/131071181/9f778a447.pdfIn PDF document text
    • https://nobixerevogug.weebly.com/uploads/1/3/4/4/134481004/6e4f565.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zaximibirada.epizy.com/template_ppt_simple_keren_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/diamond_shape_worksheets_for_preschool.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/71751809859.pdfIn PDF document text
    • http://vizaraxeforuzu.rf.gd/96772062583.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/arrest_v3_form.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/bronchiolitis_pediatric_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/33262587616.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_off0000d23f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD23F 5380 bytes
SHA-256: a17cc1679bbfd6f605379cbf97b896f58cdcf40d7c22954d49a5805e4ffaf9d7
font_01_sfnt_off0000e489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE489 10436 bytes
SHA-256: 8e67521a3edc66f13fefa8e6f97952aeb1df4113426bb9c9d2ee1bf32c4de814