Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dac10a9de779e2b…

MALICIOUS

PDF

50.3 KB Created: 2020-10-28 08:24:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f7f616a4f7847af1d175f6816750ff69 SHA-1: de1b306448c560e3ffe40c2046f6f841bbebeca9 SHA-256: 4dac10a9de779e2b3528e3842e03c3a945051ec01652e9e2918d23226e238399
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://ggtraff.ru/strik?keyword=excel+at+life+audio In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383689/normal_5f9056585e315.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_5f8835a22567e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368788/normal_5f8960e6ef26d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5f8f41074f1ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369657/normal_5f8bb43965fc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372719/normal_5f9526def072e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370989/normal_5f90d987bf55c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5f88aa151d1e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424378/normal_5f97a2e978b95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382619/normal_5f9650b9176f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380084/normal_5f8fe61219221.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415291/normal_5f98d20be8607.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374198/normal_5f8da6990b6df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f86fbb00610c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_5f8a05366bf30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384152/normal_5f9424488983f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385198/normal_5f9198c01dc0f.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/kijelopazekune/vowels_diphthongs_and_consonants.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/22189398763.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/metales_alcalinos_propiedades_fisicas_y_quimicas.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/indian_air_force_group_y_previous_papers.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

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000874c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x874C 4768 bytes
SHA-256: c8034af996574efd419dfbf1cf2c308bee22ca4bd60aa4db8be32c36099c5103
font_01_sfnt_off0000978c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x978C 10592 bytes
SHA-256: 52ff8c0a5f23e16088a61ca736165d84459d7be82c7835adabe05fc9eccadc08

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