Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec413c59f1dbb8e5…

MALICIOUS

PDF

61.6 KB Created: 2021-02-16 22:48:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 8d04eccae19403b97a39d0ae0b750d13 SHA-1: 5d4ff9675be5ea5a60d3362b0379ca338fe1ceb1 SHA-256: ec413c59f1dbb8e5f139578dc55907ecdb4c94937192ede6e9a38a174e811b58
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO spam or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and external links suggest it's designed to lead users to potentially harmful content.

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://leonvi.ru/123?utm_term=war+of+the+worlds+1953+alien PDF link annotation
    • http://pavogireb.22web.org/78323480331.pdfIn PDF document text
    • https://kebiluxo.weebly.com/uploads/1/3/1/4/131455508/6c92dc9e061085.pdfIn PDF document text
    • https://girakojazesu.weebly.com/uploads/1/3/4/6/134675992/selibagux.pdfIn PDF document text
    • https://doleroxewaforud.weebly.com/uploads/1/3/4/3/134322791/derebizokudikosad.pdfIn PDF document text
    • https://kobigaxa.weebly.com/uploads/1/3/3/9/133997295/faban.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/2744850.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/wixamupelinere/nostalgia_ice_cream_maker_with_candy_crusher_recipes.pdfIn PDF document text
    • http://mipovigubebi.rf.gd/mifatekizazisefej.pdfIn PDF document text
    • http://kewumexor.epizy.com/worship_instrumental_music.pdfIn PDF document text
    • http://xetaratof.rf.gd/94009369401.pdfIn PDF document text
    • http://kedekivotizera.epizy.com/exponent_and_scientific_notation_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/kizugadirajogutililurefep.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/manualidades_de_navidad_reciclado.pdfIn PDF document text
    • https://s3.amazonaws.com/xofalepelala/odia_movie_blackmail_song_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vabemavuputenif/61027678898.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/vomuganobonavujijip.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/15673300117.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_off0000b4d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4D7 5596 bytes
SHA-256: 111bec066d88415ef1c1d88c41e9e101c08eebfba5c3b111f90f397010b3e242
font_01_sfnt_off0000c7f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F7 9964 bytes
SHA-256: c61a2361b1f692e2337f9dbc5d919c2972333992ec1bc0250961def7ad8ce51e

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