Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a00c40b15fd4eb3…

MALICIOUS

PDF

73.9 KB Created: 2021-04-04 12:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2f36bde5c9e8cdde7d306bae0e0a67a9 SHA-1: 29556bdbe9fb102ddda3c876394cfaa67a765137 SHA-256: 1a00c40b15fd4eb35d4903973c9e37949522639a8091d656b33a66c8864b5759
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to S3 buckets and other domains, suggesting a link farm or redirection scheme. The primary URL, 'https://kuzutuzo.ru/strik?utm_term=how+to+install+canon+mg3250+without+cd', appears to be a lure to a website that likely hosts malicious content or further redirects. While no scripts were explicitly extracted, the PDF structure and extensive linking are indicative of malicious intent, possibly involving JavaScript for exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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://kuzutuzo.ru/strik?utm_term=how+to+install+canon+mg3250+without+cd PDF link annotation
    • https://lulefimoka.weebly.com/uploads/1/3/2/7/132740328/serimasanuborarebo.pdfIn PDF document text
    • https://wizujepubenepax.weebly.com/uploads/1/3/5/3/135317151/jikijud-nojokogeva.pdfIn PDF document text
    • http://bekopomulasebi.getenjoyment.net/basilica_di_san_lorenzo_milano.pdfIn PDF document text
    • https://lilikegemuvil.weebly.com/uploads/1/3/1/3/131398424/1632d132cbcc7a3.pdfIn PDF document text
    • https://koramuxojenaxer.weebly.com/uploads/1/3/4/7/134701110/3638896.pdfIn PDF document text
    • https://vexojuvij.weebly.com/uploads/1/3/4/3/134345090/9603537.pdfIn PDF document text
    • https://jepunitapo.weebly.com/uploads/1/3/1/0/131070437/2248488.pdfIn PDF document text
    • https://xajimago.weebly.com/uploads/1/3/0/8/130813364/c6f218e3.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/xelimewat/viwukewakizepaxebaj.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/damasipoxajevam.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/reportero_tv_azteca_fallecio.pdfIn PDF document text
    • http://mubodadekutaxim.atwebpages.com/93393185043.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/46268279360.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/ses_ifreleme_format_ac3_desteklemiyor.pdfIn PDF document text
    • http://pexofapu.myartsonline.com/83481985780.pdfIn PDF document text
    • http://jalijoruki.atwebpages.com/27070338084.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/aptoide_tv_android.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/place_value_games_for_2nd_and_3rd_grade.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_off0000e022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE022 5872 bytes
SHA-256: 87ea14ceaaad309b561283a67d53d7a41f2de80bf6f3580f4f9a9509531e0a4a
font_01_sfnt_off0000f40b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40B 10864 bytes
SHA-256: bddc940b05b2b992272b70fe345c38e787fc10b7077e56579dd7e7fa87990601

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