Malicious PDF — malware analysis report

Static analysis result for SHA-256 0739e6bbbee913de…

MALICIOUS

PDF

52.9 KB Created: 2020-11-01 03:28:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 241b670d02eaf20e51bb81673f43adc2 SHA-1: 5953669307ca4d947b262c73b22a01d553739369 SHA-256: 0739e6bbbee913ded77c27f6328b47e1247708b56535c0dff1f32e84ce18d60a
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download page.

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://ttraff.cc/123?keyword=torque+vs.+angle+of+twist+diagram+for+the+hollow+cylinder In PDF document text
    • https://cdn-cms.f-static.net/uploads/4378830/normal_5f97e963e407a.pdfIn PDF document text
    • https://sikisesuleze.weebly.com/uploads/1/3/4/4/134445421/1828522.pdfIn PDF document text
    • https://rurusoweloxefug.weebly.com/uploads/1/3/3/9/133989150/lakisaf-buliti-zijabivut.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/rekawexuretowo/pegoxizumog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7399/8500/files/35289533163.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71fdeded-f2f4-458c-8bbf-e473d525707a/62743757384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82bda89d-8962-4e6c-bf30-99f4b6a55751/jezakuvunefidutalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6e09b5a-abd4-41d9-870d-4255e46b4cf6/93120466814.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6967819-feeb-4744-849a-721ff9205641/95646546452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb6b6ead-acc8-4e06-90a0-901b2e78244b/22315054842.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6ae8a1b-1f18-4937-9a94-389160b19d92/63943102794.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/098a0c5c-060d-41da-9643-563867e8f4bb/37189066886.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000a891.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA891 17900 bytes
SHA-256: a9b8b879987572315ce9b98e16ba3274030dec47bd2d029fdc76219079b9aa0f
font_00_sfnt_off00006b4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4F 5796 bytes
SHA-256: 29cfe657a32b969feddfe8820fdec64eee52a0ac1cdbb287f699cf76688d14ec
font_01_sfnt_off00007ef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF9 13276 bytes
SHA-256: 43d1d868a93c454d1be35c9a0bb1358a3777cfd1dd766bbb4534957a8d1f83a1

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