Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d251265f05f5120…

MALICIOUS

PDF

73.2 KB Created: 2021-03-14 05:32:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d9da965f1ae4d645bdc8a16fa56885d3 SHA-1: 2103e2b7a0aaa6bec4e4ce7ae4d006d88505a811 SHA-256: 0d251265f05f51207e4d83cf6a8b817cd9320f8666e87e20c748db0f60ff081f
156 Risk Score

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 0.9997

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/123?utm_term=community+helpers+coloring+sheets+for+toddlers PDF link annotation
    • https://vufaredagisab.weebly.com/uploads/1/3/4/5/134585575/4552097.pdfIn PDF document text
    • https://wezusewowanura.weebly.com/uploads/1/3/4/2/134235680/zikatirifo.pdfIn PDF document text
    • https://dodevapamoj.weebly.com/uploads/1/3/4/3/134352329/7112435.pdfIn PDF document text
    • https://xavozunop.weebly.com/uploads/1/3/4/3/134305705/xekitavufovevame.pdfIn PDF document text
    • https://lirigudufov.weebly.com/uploads/1/3/0/7/130776684/e1c7d4f51a252a.pdfIn PDF document text
    • https://gixakipero.weebly.com/uploads/1/3/1/4/131412713/wimujudo.pdfIn PDF document text
    • https://medivurufif.weebly.com/uploads/1/3/1/4/131407406/4091066.pdfIn PDF document text
    • https://ninukiwipovesot.weebly.com/uploads/1/3/0/9/130969879/zokokejuwapu-tebalipima-kizideboxilogi-lamab.pdfIn PDF document text
    • https://ranezilipevag.weebly.com/uploads/1/3/5/3/135392607/kumofijodide-rorosibos-toroni.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/tutapaxi/what_kind_of_trees_grow_in_central_florida.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/cavite_mutiny_spanish_version.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/attack_on_titan_game_3d_download_pc.pdfIn PDF document text
    • https://dbb1fad9-9c05-458f-9e32-bc0b7f65d7ec.filesusr.com/ugd/451461_5f526de3713044319e10490df807a8df.pdf?index=trueIn PDF document text
    • https://cd70d4e5-4a1a-4071-96d1-f2415ea5ece1.filesusr.com/ugd/7f46b5_d7176cfbd6b543cdb0107da6dfa28f0c.pdf?index=trueIn PDF document text
    • https://065b66ee-25d8-4381-b309-094abc4d823c.filesusr.com/ugd/2703e6_8db1ba9be85444879d79fd9cee103b70.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/varolexexus/recipes_using_crescent_roll_dough_sheets.pdfIn PDF document text
    • https://58960a86-a3f4-42d8-866e-ee2cf32068b1.filesusr.com/ugd/1ad962_e1284af749734f349c9e5fc7855e7e72.pdf?index=trueIn PDF document text
    • https://e8e87dc5-637d-47ba-9de6-e7d98d123d78.filesusr.com/ugd/a69a03_93aef9188a714d2d8fc049506f99f030.pdf?index=trueIn PDF document text
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_2c9b39a8fd054e7da99e035d3d4bfdb7.pdf?index=trueIn PDF document text
    • https://170a7d3c-74f0-42f5-9ead-98ae292a4922.filesusr.com/ugd/a18aa6_82d74da1a0f84486bfdb5fd21919022b.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_off0000e077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE077 5368 bytes
SHA-256: 2396e2ac481e9df0ed490ca2cbe18cb06102a924bb97f5b4bc44f195bf7245b0
font_01_sfnt_off0000f297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF297 10628 bytes
SHA-256: 141e313d8364bb1f54705ee83969e4a3468c6f251afb7111a12b6c073e8c0f4b

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