Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3bc8a57fc324910…

MALICIOUS

PDF

105.1 KB Created: 2021-03-27 19:24:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 87c887eac732961a3bd344d1fd5b1c8d SHA-1: cb24649dcec16b481f51e3072694fffa2ce34c38 SHA-256: d3bc8a57fc324910e789baf7dedc35abfd441b66a4d1152c195cab8bdea0bdbf
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 0.9995

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://botokaw.ru/award?keyword=attitude+scale+in+research+methodology+pdf PDF link annotation
    • http://dektesheff.xyz/bd_result_hsc_marksheet_2019vu0d2.pdfIn PDF document text
    • https://xovuxajewilim.weebly.com/uploads/1/3/0/7/130775567/340615.pdfIn PDF document text
    • http://podjem2.club/bibliographic_information_apa_example1286v.pdfIn PDF document text
    • http://prizinsta365.site/28333493003idm0c.pdfIn PDF document text
    • https://totaduwuvib.weebly.com/uploads/1/3/0/9/130969262/c703a56667afe7.pdfIn PDF document text
    • http://tizezs.xyz/19147255381vwwjg.pdfIn PDF document text
    • https://dofedexakupular.weebly.com/uploads/1/3/4/3/134317333/dipodisegup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://23da7c74-6e14-424a-b22a-901aa35eafb1.filesusr.com/ugd/9cc572_747bd0a412704cffab1696b3106b142f.pdf?index=trueIn PDF document text
    • https://93bb5028-8b17-4c47-8ab9-f46a024b0e86.filesusr.com/ugd/041612_2d5fbefe98254c42b1852d83fdc72306.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/legipalofi/way_back_home_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/71292625693.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/ada_2013_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/2848725095.pdfIn PDF document text
    • https://b5d51143-f34a-4a4f-9265-6917490cb775.filesusr.com/ugd/9f69bd_3bac93fbc7e04113b26490e48ef9d042.pdf?index=trueIn PDF document text
    • https://189c2d36-84ff-4b81-9465-96c33c1d3b91.filesusr.com/ugd/35ddae_78ee7925f38c4105b4f3acd7e66639e1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/liluvad/govar.pdfIn PDF document text
    • https://ec8c99fd-5413-4e38-b6a0-2ccbba71fc6f.filesusr.com/ugd/de02f3_5418e78e45ac4c5685131553cca504d4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sedowedi/bandook_chalegi_video_hdvd_9.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/email_template_inquiring_about_a_job.pdfIn PDF document text
    • https://d7301f0f-9730-4f6e-9d95-601e203cb770.filesusr.com/ugd/253413_0c12e07ec24040a3aa78f1092271d635.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/66372703969.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/44810167888.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/41491215286.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_off00015c6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C6C 5660 bytes
SHA-256: 93e08222dca2b569596fe969378f640f11f80e63ec55e15b38430b99d382c14d
font_01_sfnt_off00016f8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F8F 11696 bytes
SHA-256: 499911a0172fdbf25feaebab0e93edd9e3cea41801a28adf882dce95c929beb8

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