Malicious PDF — malware analysis report

Static analysis result for SHA-256 a652feddf8303e85…

MALICIOUS

PDF

37.5 KB Created: 2020-10-31 03:52:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: de45862a962f4fedc5b0c99cc2b3bb8d SHA-1: 4e97a27e2c1c501f6004242339a43a648dd50b20 SHA-256: a652feddf8303e85746d3f1281c748bd16d80b62560c7d795f3d63773f4087a0
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link that redirects to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to trick the user into visiting a malicious site. The ML classifier also flagged this PDF as malicious with high confidence.

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/123?keyword=how+to+download+technic+launcher+on+mac+2019 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421058/normal_5f968b5d96fe9.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/6305813.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369900/normal_5f8b65d9287b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368506/normal_5f8897a72ce78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413862/normal_5f9413db1e489.pdfIn PDF document text
    • https://repumuwijuruto.weebly.com/uploads/1/3/4/4/134469056/4e8fac0dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410986/normal_5f9cbe3c5389e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383703/normal_5f96f5447edb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370278/normal_5f8c2758d45d8.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/guwutivupudutu/zijaxesevamebudefa.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/archaeological_anthropology.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/certificate_of_origin_format.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/62008948294.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/kamalofukifipibetuzen.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/1_to_10000_numbers_in_english_words.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_off0000532d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x532D 5536 bytes
SHA-256: fee72d94daae101e552c69311c6c4a9688354d358aaedc1632287553639e5a47
font_01_sfnt_off000065e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E6 10084 bytes
SHA-256: 94475e0117110ca231c40f1610ef8dae80f7f582d6422d20fd7b5eb95cf7e6c3

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