Malicious PDF — malware analysis report

Static analysis result for SHA-256 64389b9333306e9d…

MALICIOUS

PDF

69.1 KB Created: 2020-11-26 05:28:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f2326ddcc22ac8fb5ce5ad3c1536fc55 SHA-1: d80367c46540e9bb7ba4c31300628f969142b901 SHA-256: 64389b9333306e9d6320f41439e241044e0060e125f97715fd0101a20e5d12b9
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/strik?utm_term=ap+euro+short+answer+questions PDF link annotation
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/6589686.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369655/normal_5fbc266c983e0.pdfIn PDF document text
    • https://baxujemig.weebly.com/uploads/1/3/4/5/134593920/6795127.pdfIn PDF document text
    • https://jamobosis.weebly.com/uploads/1/3/4/6/134684796/solukedexikulu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372982/normal_5f9c54e0b716e.pdfIn PDF document text
    • https://nuzudaguzawoj.weebly.com/uploads/1/3/4/7/134717590/e02af6115d3fc.pdfIn PDF document text
    • https://mepafuxutare.weebly.com/uploads/1/3/4/6/134660934/sakitivezilike.pdfIn PDF document text
    • https://xexovelez.weebly.com/uploads/1/3/0/8/130813416/820ee7ff7f3.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/7d7b6617ab8.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/muxegeza/kojanijemel.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/metso_jaw_crusher.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/mipuneza.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/59077410481.pdfIn PDF document text
    • https://s3.amazonaws.com/degerutisig/pigamef.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_off0000d203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD203 5080 bytes
SHA-256: 38fd27702a73c8dac77859ce57fab86cd68c51dbaa6e03961783709f4109b129
font_01_sfnt_off0000e359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE359 10740 bytes
SHA-256: 2e74f72fbb0358dde59b13daf8d40f10e08e4d19eb6db675c7ea2719aef6334d