Malicious PDF — malware analysis report

Static analysis result for SHA-256 1be66ef0febeae0a…

MALICIOUS

PDF

71.5 KB Created: 2021-02-22 05:30:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8b08ae33569054602f331d1a59b462ff SHA-1: 7360179bb7543ddeb69847bb8d71be166c3fa0c2 SHA-256: 1be66ef0febeae0a28e766f2f2acd8b74bad3ab30e31ae7588cab8756f7f8a32
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body's title, 'How to make an unhappy child happy', is used as a lure to direct users to potentially malicious external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/strik?utm_term=how+to+make+an+unhappy+child+happy PDF link annotation
    • https://bipozoxadedisaj.weebly.com/uploads/1/3/1/1/131164124/7704348.pdfIn PDF document text
    • https://buzolemego.weebly.com/uploads/1/3/5/3/135393469/kagebixiwepowe_jivadigunisa_solubo.pdfIn PDF document text
    • https://vawosikajoj.weebly.com/uploads/1/3/1/4/131438279/95b21d44a.pdfIn PDF document text
    • https://fezewemekerod.weebly.com/uploads/1/3/6/0/136050953/50223.pdfIn PDF document text
    • https://doselarifiniwa.weebly.com/uploads/1/3/2/8/132814949/c058210.pdfIn PDF document text
    • https://tidurikax.weebly.com/uploads/1/3/1/8/131856133/toruburigiwewub.pdfIn PDF document text
    • https://wowevabesal.weebly.com/uploads/1/3/5/3/135322278/702fe5.pdfIn PDF document text
    • https://natesikapepik.weebly.com/uploads/1/3/4/7/134750077/difub_sipakewi_fageri_pigileziz.pdfIn PDF document text
    • https://forijadezututeg.weebly.com/uploads/1/3/0/8/130813765/2108635.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/rovikibixu/24175288856.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/24478787076.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/savuv.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/free_birth_chart_analysis_report.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/xogopujakukipulaxuvij.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_off0000db98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB98 5260 bytes
SHA-256: 0c78857542cbfb3c6c3a0bee37b92963479c4fa8465d623901b41b3052c9d139
font_01_sfnt_off0000ed67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED67 10376 bytes
SHA-256: 9c3459403e612b976c6cc98b7f64c544b25dfa908243f1f5175a31df582f73ee

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