Malicious PDF — malware analysis report

Static analysis result for SHA-256 475d261aae35b15c…

MALICIOUS

PDF

46.8 KB Created: 2020-10-30 06:49:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 694ae0f9654494598ef09e957e79cbb0 SHA-1: d2c3d4de0620854223995c61d34cf8e74ccf6dc6 SHA-256: 475d261aae35b15ca8ac824ba89976edaf797f75f9735a434f7d168c03c413e2
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://cctraff.ru/123?keyword=symbols+of+rebirth+and+transformation In PDF document text
    • https://cdn-cms.f-static.net/uploads/4405946/normal_5f9b46c6ce8c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368750/normal_5f8c4a60e5dda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f9276a3172a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f90d662d0bc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368240/normal_5f98493024d8f.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/zobuwubedak/23096101253.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/bennie_and_the_jets_piano_solo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/8256/5782/files/glacial_water_dispenser_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/75322130765.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/23675422200.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/16138954268.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_off00007684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7684 5492 bytes
SHA-256: bdde8cb189cdc84517850eb17c6f0d51bffe8f1b26a66a093be5d0cedee7c23c
font_01_sfnt_off00008902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8902 11032 bytes
SHA-256: 5f6a48aa2e0827e794a8de0a1ab907429bd9fa120eeabbd9651b639a37b5e76c

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