Malicious PDF — malware analysis report

Static analysis result for SHA-256 64d3e09f27ad5f57…

MALICIOUS

PDF

72.8 KB Created: 2020-12-02 20:59:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c4791657bfe4a1952951e03fbd2b5f4f SHA-1: 9df7724a97687312dd6cd55541e1ac3f8fc4feba SHA-256: 64d3e09f27ad5f57924bf0f9157e4e36ea44b4ba6ab94ce78af1a6a223c051d5
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 0.9998

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://traffine.ru/123?utm_term=libros+del+antiguo+testamento+nombres PDF link annotation
    • https://riwitasaroxaga.weebly.com/uploads/1/3/4/6/134656256/2014ec0eca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367944/normal_5f8900e7dfb66.pdfIn PDF document text
    • https://ziwirekow.weebly.com/uploads/1/3/4/5/134529616/gukewutusetoroxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482854/normal_5fadeae1d7b37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403960/normal_5f98860ed7b07.pdfIn PDF document text
    • https://wibugosavuzatug.weebly.com/uploads/1/3/4/3/134349607/zozodexin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383798/normal_5faeccae9bf9d.pdfIn PDF document text
    • https://wevupifusa.weebly.com/uploads/1/3/4/3/134356286/fudezudubedulo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393029/normal_5fb3c84e83852.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/kizugokofo/sonugilo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4a28486-078a-459f-92fe-72547d9d5efd/heads_up_baseball_2_0.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/bagupetif.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/livre_apprendre_francais_pour_adulte.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/ga_power_report_outage_map.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/82823169739.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14e52fd2-f353-49b6-a3af-aa48546a056e/warinozulusejedof.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/freemake_video_converter_crack_4._1_10.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/sutubaxume.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF54 3876 bytes
SHA-256: 79c91a7eeccd8230d07a600dd2e5f6ea7e62def2aea20a42485f3c227f4f31df
font_01_sfnt_off0000dd2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2C 5228 bytes
SHA-256: f7324b8befdde596c62d3c792cd9583ad9b4963fa4506dadc6292b4d1b7a327a
font_02_sfnt_off0000eedc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDC 11856 bytes
SHA-256: eb8d320cbe7a4667ac652df89b96684880f34b18f07670ec5d24e94d2ded0b38

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