Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e7be11a280df49…

MALICIOUS

PDF

37.5 KB Created: 2020-11-04 19:47:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3aa0c1eb524c1589f6002961ddb22406 SHA-1: 9828d4f1da3a6f35a0d11af548f28631c0b2eb5e SHA-256: b1e7be11a280df49bad0ecf710c9d46c6abebce49193a64290731e606d3a6eba
94 Risk Score

Malware Insights

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

The PDF contains a direct link to a known malicious redirector infrastructure, which is a strong indicator of malicious intent. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the redirector suggest an attempt to lure the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://gettraff.ru/aws?keyword=ma+notes+pocket+guide+3rd+edition In PDF document text
    • https://damokilusul.weebly.com/uploads/1/3/4/4/134463963/xunodugulixewu.pdfIn PDF document text
    • https://mibonapa.weebly.com/uploads/1/3/4/3/134308174/nederufilujofob.pdfIn PDF document text
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/fegezinujowopetini.pdfIn PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/jenavilinab-dofivefimuv-tovefidibanefi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b13469c-e6fa-4828-8ee1-1c7220e94e72/27980033745.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/11158447505.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/611b9bd9-4a0f-459c-94a8-83f361542a9e/15634617044.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/5337949349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/160070c8-9566-43d8-ae51-057e5aaf15de/xifikubeva.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/becoming_michelle_obama_vk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf5f7305-b4d3-49bf-9c53-09dc30829b4f/sujazo.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/56144960467.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92178261-922a-4b5d-8ad1-e07c8ec8db44/95945741984.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_off000050f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50F7 5440 bytes
SHA-256: f4648912342a96ac558691de96a0afa63f7dae97c175e1eef3712880dab9eeda
font_01_sfnt_off00006397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6397 11112 bytes
SHA-256: 158184e10d3a35aa6d1027ee6fbc372165c6425ba7d985310372a1b76225fdec