Malicious PDF — malware analysis report

Static analysis result for SHA-256 4789132f9677aaf5…

MALICIOUS

PDF

62.0 KB Created: 2020-12-17 16:02:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a05035569e03b840bfc6fab3220c1589 SHA-1: 9d3c34a2ba661a6f578bb087c6535472f40c2cc0 SHA-256: 4789132f9677aaf5687b5c27f00a9ba3fbc6c83a016984d0e0ba58100dfc5025
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 0.9996

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://traffnew.ru/strik?utm_term=brendan+behan+pub+food+menu PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389586/normal_5fb5402df0aed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366399/normal_5f9f7962e1e86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367947/normal_5fb57eec99eb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377101/normal_5fd8254a50d78.pdfIn PDF document text
    • https://fitisasituwag.weebly.com/uploads/1/3/4/8/134846324/vaton-katufodag-temomilidax-fuwuvexidez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448343/normal_5fa23edf3f09e.pdfIn PDF document text
    • https://pujuferot.weebly.com/uploads/1/3/4/6/134657525/wujuzuzazizot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0efd7cd1e280355d47a09/t/5fced0b057846c5b834407ad/1607389361767/rolebuwep.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/53876330640.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59addc6229360ecccea80/t/5fce5075cded405bb8086365/1607356533071/ouroboros_fma_signification.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc386dd1c8c7413144296be/t/5fc48d0f4f9837572070e746/1606716691815/iskysoft_audio_recorder_reviews.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1162b68612547ed5f39f0/t/5fce33366f0099009e8f083d/1607349051747/binary_options_simulator_strategy_1_minute.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3242724b06a7eb30dea98/t/5fd0e13d0c0c9b10ab141a3f/1607524669278/nobapodid.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc538db239b0722914d94cd/t/5fcbff8fd235d37878b0d81a/1607204752132/93543102979.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4f56dd26ff1194f8deacd/t/5fc81590f97c193540e0f05e/1606948241294/celcom_top_up_kena_block.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_off0000b5fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5FB 5260 bytes
SHA-256: beeff4284c2baeefd4e048b0dc540849b94c1d0a1e44629a3a1a5c60c85ad3d8
font_01_sfnt_off0000c7ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7AD 10364 bytes
SHA-256: 08277f703d3140e10afe61383c4633e14b2650362b21b07b00196d64104d7f3d

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