Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fd426ed7bef0452…

MALICIOUS

PDF

44.6 KB Created: 2020-10-28 12:12:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6049cedee4bf55b2ad06763a50ab7948 SHA-1: bbfaabf80c00dd9a4d46f15fc4951ea355b2cb4e SHA-256: 4fd426ed7bef04523d3cff62644570333b2109033b07e42b5af77cebc5b0a75e
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded links that point to known malicious redirector infrastructure and a link farm. The heuristic firings indicate that the PDF is designed to redirect users to potentially harmful websites, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?keyword=lynches+river+electric+internet In PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/pilukane_vegezefuromi_pawonurat_puxopudofifa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420927/normal_5f97289935b56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369783/normal_5f915b3cb60dd.pdfIn PDF document text
    • https://fevixivosetakub.weebly.com/uploads/1/3/2/6/132681861/xotudijozalikeme.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366337/normal_5f8d8957533c2.pdfIn PDF document text
    • https://juwarojolajekol.weebly.com/uploads/1/3/4/1/134108785/rilamoxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403948/normal_5f99209b321dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f90d6ae41d59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f8704565841d.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/62b978b206.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/1/0502/2393/9753/files/nominalisierung_bungen_c1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4643/5488/files/dinepelidus.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/an_authenticated_history_of_the_famous_bell_witch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b279202e-7abc-476c-a70e-80da20c58787/jejudanaka.pdfIn PDF document text
    • https://s3.amazonaws.com/suxiweke/as_is_bill_of_sale_texas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7051/3846/files/walton_elementary_school_phone_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d34ac79a-c3a1-41a6-992d-2b993760d0d7/77763037171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a998256-da4e-49b2-9856-84ddce620fb7/kowezesuxasumeropipanin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4503a5c-1bcb-41af-b7bf-7794f2ec0c1f/77949393594.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/boss_me_25_user_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0ce8958-edd3-44f3-a9c1-2fef9c943d0f/pexim.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/tifume.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_off00006fce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCE 4780 bytes
SHA-256: 7c50cc35919030967915e5e3254e1642e52a177a90540ed68826758aba01d0b3
font_01_sfnt_off0000801b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x801B 10892 bytes
SHA-256: 4fc396c42dedf6775be3ae08d412274790616d4bcb77914a954dddd2daaa0f16

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