Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebbcfb8d2b3cb975…

MALICIOUS

PDF

71.7 KB Created: 2020-12-21 05:52:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 541bde8613a8f161301c87435c7a38a0 SHA-1: 9f08296a1c42275511f501cc45c342fcb4730136 SHA-256: ebbcfb8d2b3cb9753609e59d9bc9f5f9db91cf09c5aaffb1f2f028dcab4f0d1a
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, with the primary URL being a suspected phishing or malware distribution site. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm suggest an attempt to redirect users to malicious content, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/strik?utm_term=cross+wallpaper+hd+1080p+for+mobile PDF link annotation
    • https://sidugavumudoriz.weebly.com/uploads/1/3/4/9/134902227/7df6df8ab2dd3.pdfIn PDF document text
    • https://xekijepomi.weebly.com/uploads/1/3/4/5/134508866/97987103.pdfIn PDF document text
    • https://pepotoxuxomupav.weebly.com/uploads/1/3/1/4/131483830/mepinerupox_nosotu.pdfIn PDF document text
    • https://fixivure.weebly.com/uploads/1/3/4/8/134888316/sevudojutilina.pdfIn PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/zixotipu.pdfIn PDF document text
    • https://wozizagozesa.weebly.com/uploads/1/3/4/8/134848764/jelemubusebogirur.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/sukedil/tabopofolimufujivuril.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/87882399413.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/57775657162.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/4415362018.pdfIn PDF document text
    • https://s3.amazonaws.com/rokuwapesu/word_for_grey_area.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/49416183219.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/modelo_biopsicosocial_psicologia.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_off0000d920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD920 5804 bytes
SHA-256: bf7597f4e663d000dacd542391b6ff55c9625fc5632a0e8ca76b15dff470f1ca
font_01_sfnt_off0000ecc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC3 11040 bytes
SHA-256: 5542fff9fc4f133da14f57373f0c82366536d1d7ec40e3d5381cda87f9346af3

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