Malicious PDF — malware analysis report

Static analysis result for SHA-256 89079919d786f8b2…

MALICIOUS

PDF

84.2 KB Created: 2021-03-09 13:25:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cf85d327c9a883c2bd53fede21d6cf34 SHA-1: bd969e51c550359f8532a28d095911e0f049e038 SHA-256: 89079919d786f8b2f66527de8e033f8a2c1055b4793fb8fffcb6122d41168df7
156 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 ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://dafemum.ru/strik?utm_term=certified+fraud+examiner+certification+in+malaysia PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4409396/normal_60028d6c14bcb.pdfIn PDF document text
    • http://maderajapodap.iblogger.org/tonozok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421969/normal_600e1248af71d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451955/normal_5fd64f80ddf10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499636/normal_5fd81b105f848.pdfIn PDF document text
    • http://jisuwadizo.22web.org/burna_boy_killin_dem_mp4_video.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425515/normal_6021a4f1d0d81.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://689a2394-1721-4ce0-b6f7-af9f1dc0d621.filesusr.com/ugd/0f5b72_03d1e489231a4c3085e80180cd1a2515.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xapota/72859577247.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/41726025409.pdfIn PDF document text
    • http://fujaled.epizy.com/regej.pdfIn PDF document text
    • http://zokitamuna.epizy.com/suxowafevebonuf.pdfIn PDF document text
    • https://e9abb47e-19e5-4ec2-9f3c-2aa4e6f2bf0a.filesusr.com/ugd/92be99_bc2d72b16ac74a2093a4bab52b38d40c.pdf?index=trueIn PDF document text
    • http://vuruwabudakase.epizy.com/keynote_app_presentation_template.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/26595877902.pdfIn PDF document text
    • http://bumilamufitilu.epizy.com/bootstrap_responsive_table_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/70590417861.pdfIn PDF document text
    • https://c216880a-03a2-4774-ab7e-121c93799e8f.filesusr.com/ugd/b5aed9_62301c57e7904f0daaf4028280580e03.pdf?index=trueIn PDF document text
    • http://mufiwajonutewom.rf.gd/how_to_factor_trinomials_easy_way.pdfIn PDF document text
    • http://tipixerokofor.epizy.com/66311052723.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/neumonia_fisiopatologia_2018.pdfIn PDF document text
    • http://vonodese.epizy.com/bksb_english_level_2_diagnostic_answers_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/31336548158.pdfIn PDF document text
    • https://edefa294-c65c-46c5-840b-8a4669b9fdfe.filesusr.com/ugd/e4a001_c92291c55e2947b9befa18d66b0f817d.pdf?index=trueIn 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_off00010bed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BED 5240 bytes
SHA-256: 9add95c97c99206c24b67337e05e6e5564953f51c72b16e47f2075e72d13d0ce
font_01_sfnt_off00011db5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB5 10848 bytes
SHA-256: 681f79af568c1a57131c438d5789fc439d2b09d7f20b8369508d1c94e0d4ce16

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