Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb63a64cbe4be546…

MALICIOUS

PDF

69.5 KB Created: 2021-01-01 17:15:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 05deece72a7b5a2c6da76369bc779d84 SHA-1: 77450ceee29216dd0424808720f2abe7835b8e12 SHA-256: cb63a64cbe4be546ac10054ef24b79e55af2bf36ca03fa31c8d8c3f638521dc9
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Ms jean's southern cuisine' and authoring application details, suggesting a lure. The presence of numerous external links, including one pointing to known malicious infrastructure, indicates an attempt to redirect users to malicious sites for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffine.ru/123?utm_term=ms+jean%2527s+southern+cuisine In PDF document text
    • https://static.s123-cdn-static.com/uploads/4374362/normal_5fef1825bee07.pdfIn PDF document text
    • https://koterevimudo.weebly.com/uploads/1/3/4/3/134342185/4986a2a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470387/normal_5fedd71f76c75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5faee6490268c.pdfIn PDF document text
    • https://cdn.sqhk.co/pevejotomoma/ZZYghjj/champions_hockey_league.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401985/normal_5fa769b65db0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372753/normal_5fa7e7faa7961.pdfIn PDF document text
    • https://cdn.sqhk.co/muxigatatini/gf1Kypo/jimuel_pacquiao_new_girlfriend.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457582/normal_5fa91cd8360a5.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/jixerubowi/88814567222.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0729ee1b-4571-4c38-b4cb-b7c006828a99/xulula.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/paternity_leave_form_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98ccab16-0e16-438b-85c1-6d75aa667efe/como_eliminar_una_cuenta_de_gmail_para_siempre.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/dragonwings_chapter_4_questions_and_answers.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_off0000d4e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E2 4968 bytes
SHA-256: d71937aa1edc2dd84f01044c68bdcc8c413f5588116de95b10f9c43f4eedff4f
font_01_sfnt_off0000e5d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D9 10196 bytes
SHA-256: fed30377bd6c14ffa1dc6a4c40386eb6c75f00844e610cd52d5d42fd50a0d3b8

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