Malicious PDF — malware analysis report

Static analysis result for SHA-256 55014ff8bb85ddae…

MALICIOUS

PDF

72.0 KB Created: 2021-04-28 20:47:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f70d5eefff1a94b81cb0bf316ef1f6aa SHA-1: 9f0652b3486ce2299f786d04cdf355b5b16e0074 SHA-256: 55014ff8bb85ddae90ca5b4561561688af759d6d607f1d1cde0e5b1fb940a76a
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO farms or phishing campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/strik?utm_term=lenguaje+corporal+del+gato+pdf PDF link annotation
    • https://mebodamuruwij.weebly.com/uploads/1/3/5/4/135400263/5117ee8.pdfIn PDF document text
    • https://cdn.sqhk.co/nemoludajedu/cihDjeq/16755375389.pdfIn PDF document text
    • https://romevezijije.weebly.com/uploads/1/3/4/7/134756673/fuwonipetupuf.pdfIn PDF document text
    • https://cdn.sqhk.co/pigevikuwi/djefzif/mimepowemukawovexun.pdfIn PDF document text
    • https://cdn.sqhk.co/gosukutusu/uPhihiL/cute_puppies_breed_names.pdfIn PDF document text
    • https://sewigemebovoneb.weebly.com/uploads/1/3/3/9/133997870/witepinutibokil.pdfIn PDF document text
    • https://cdn.sqhk.co/duditizonut/jajOher/49083426524.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/cUgg8Iv/word_trip_level_498.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/rJRiaD8/piano_tutorial_faded_slow.pdfIn PDF document text
    • https://cdn.sqhk.co/givifevulo/Ejim6ja/what_does_la_novela_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/nowazedadara/hjgjd8K/mapevujolomejop.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/futamo/information_meaning_in_gujarati.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/beauty_school_dropout_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/sitiraxez.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/ponasozurarinanudi.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_off0000dcf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF6 5160 bytes
SHA-256: 563d341b77ac9cf0f84be6dc2a22806062639726d7a81f0180710de10609e7f0
font_01_sfnt_off0000eea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA3 11248 bytes
SHA-256: 863e30eec1d8a7c3224fe5c800d2da8c54190f345c6dd3e18903d513328ed7d1

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