Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d441ca560620a04…

MALICIOUS

PDF

44.9 KB Created: 2020-10-26 11:49:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a4b6815c998bd6771ba614fdbe83de45 SHA-1: 2c4e67831387684f0b7552b7aa2b9642e3c35abb SHA-256: 2d441ca560620a048400afb8f9208c1d7c21784cd2d05d337bcb252660fb59c8
154 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 a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The ML classifier also strongly indicated maliciousness. The presence of embedded URLs and the nature of the redirector suggest an attempt to lead the user to a phishing or malware distribution site.

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=proshow+producer+online In 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/1/0266/9176/4414/files/96735777606.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3897/3345/files/kapagenutodixukaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7793/1686/files/boriroweduwor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9571/8591/files/binixoxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4139/6638/files/chemical_equations_gizmo_answers_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/2854/7237/files/vobuki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8073/6151/files/ancient_dragon_bone_skyrim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7277/4850/files/great_gatsby_characterization_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5394/6782/files/jupejeko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62f82b71-36c2-4532-a94a-7a1a8f36c1fc/70760025880.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4efd3be8-b426-495c-9f51-503833992b77/10037514117.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afbc4043-0c4a-4431-ab54-6b004ab73ba2/8277371968.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/modern_mosque_architecture.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/70690233962.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/fudagukedurugaxijuritu.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/5082235758.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/74513924857.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/gree_air_conditioner_remote_control_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/wevutikedovutamilisuzem.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/sukaduvomi.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/sbi_bank_pass_book.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/shrimad_bhagavad_geeta_in_sanskrit.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/new_international_business_english_teacher_s_book_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/srimad_bhagavatam_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/cbsa_declaration_card.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_off00007171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7171 5044 bytes
SHA-256: e902ddc7cd0c828dc4b1b35bc116381952dd08359007a9a7de14f9b3aa02e443
font_01_sfnt_off000082a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82A2 10572 bytes
SHA-256: 553326f78f824c4f71e5605e993a6a5481e69705314d85bbcb1958b285b02479

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