Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fb5444bfc787ac1…

MALICIOUS

PDF

96.1 KB Created: 2020-10-31 09:29:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4c9a03f0a637139e8f33d0e27e668454 SHA-1: 11578a4df5d278a48073acacdd7d57c4ae84505a SHA-256: 7fb5444bfc787ac131b67656008e4c050c6d2ea77615c60da52ef8b1cf3dc861
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://ggtraff.ru/123?keyword=bunching+and+minimum+value+addition+threshold In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370543/normal_5f8a638ba9e42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392873/normal_5f93097984537.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/5a82e9d3-f089-49bb-96d9-a17c104bb54f/7888825243.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/jabibekeporajevilu.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/ews_reservation_form_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bajuse/empires_and_allies_mod_apk_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/zetapuruzugabipu.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/science_of_the_total_environment.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/entrepreneurship_development_notes_for_bba.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/pinuk.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/xirame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/608054c7-a95f-427b-8419-c9c419612178/animal_adaptation_worksheets_for_middle_school.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/oops_interview_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/pdf_to_word_online_best_converter.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxuledo/phylum_chordata_download.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_off000135e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135E0 5464 bytes
SHA-256: 259c4b36cd34fadb32a387530ad3afbd0c979c023f00c344b345a0f6fd2db5be
font_01_sfnt_off0001484f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1484F 13048 bytes
SHA-256: 7947c072a386135a44a989275b6a3dfb6dc535891ac9f5e38deaeb2267e1bc5f

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