Malicious PDF — malware analysis report

Static analysis result for SHA-256 43dbd000e4e73386…

MALICIOUS

PDF

56.3 KB Created: 2020-10-31 16:22:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2317b09e29b4d2add7cb101e99af5d4a SHA-1: 1f01291711a920b2896e169c56c2e2b7f4640f93 SHA-256: 43dbd000e4e73386a50770edf2ca06fa33f6bc5fb0f9834606a9016c36daf40a
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://ttraff.me/123?keyword=qad+kafani+ilmu+rabbi+mp3+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f8bfa7315cfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412382/normal_5f969f358a2bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367017/normal_5f8bc49eceabf.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/zuzuw-gavodokev-sanijalunupotij-pixetu.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/mogimodagoparafo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419851/normal_5f96d933d9dc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388619/normal_5f943368d5fc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403563/normal_5f96e5418020b.pdfIn PDF document text
    • https://folarudivol.weebly.com/uploads/1/3/1/8/131871739/nawobakana_beziru_sazilevuvafigif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8332/8405/files/24143692387.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/vogorofawadigut.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/ap_bio_heather_quotes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/6962/9350/files/non_st_elevation_acs_guidelines.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_005_off00009fd3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9FD3 27844 bytes
SHA-256: bb412c38716ff63790a5a7cb2f395190fa7af746c4f68c032cf7a435ff8c0e5f
font_00_sfnt_off00006744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6744 5528 bytes
SHA-256: 089271eb4be458e3f320dfbd573743487a2a5154688d663497d8a8b42e8584d3
font_01_sfnt_off00007a0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0E 11044 bytes
SHA-256: 15cf9fb60f1b851a2d962ec7e1fc1cacaac6f218115e72cb40858199c14d5324

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