Malicious PDF — malware analysis report

Static analysis result for SHA-256 d111e402543db148…

MALICIOUS

PDF

73.7 KB Created: 2020-11-24 05:36:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d0326ee51594813b07483a9f9a552478 SHA-1: 2bb813385f7e1a4012446aee59b56bba5f0c2ed0 SHA-256: d111e402543db14893d43be1f096f79786d25d54fccf736480242f3da4d45010
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 0.9998

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=critica+libro+ciudad+de+papel PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5f99e9fbb9b37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369336/normal_5f87f08610415.pdfIn PDF document text
    • https://vewutaniwem.weebly.com/uploads/1/3/0/8/130873717/f654a7e6.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/dilozanuzebew_fujodako.pdfIn PDF document text
    • https://penopetidurip.weebly.com/uploads/1/3/2/8/132815040/karasupav.pdfIn PDF document text
    • https://pidadilux.weebly.com/uploads/1/3/4/6/134666204/ec5dbbf2198.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/gazijewevan/tupuwipavato.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/pdf_to_dwg_converter_online_converter.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/20929277354.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/how_many_meters_are_in_one_lap_of_a_track.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/vilivoleveba.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/28207366565.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_off0000e371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE371 4936 bytes
SHA-256: db25b194710977421147f5a397f75346a07aa921f4c113eabd4cabc445f57544
font_01_sfnt_off0000f439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF439 11344 bytes
SHA-256: 85392dab1826cb953d04302d290d3d76ece08040ffcc2548bd6328351c016eb0