Malicious PDF — malware analysis report

Static analysis result for SHA-256 9790527e08bbe95e…

MALICIOUS

PDF

81.0 KB Created: 2020-12-15 22:50:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c42bc2b488aee4cfc3f74d2058f2a1d6 SHA-1: ed2f95fde30d521bf8588df5d87240ce702b7bdb SHA-256: 9790527e08bbe95eecf8ed0f585aa503f8e289c88ec29cd12210992b74f135a7
214 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominently pointing to a known malicious redirector URL. The heuristic firings indicate the PDF is designed to redirect users to malicious infrastructure, likely for phishing or to download further malware. The ML classifier and ClamAV detection strongly suggest malicious intent.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=betrayal+in+the+city+play+pdf In PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/4045700.pdfIn PDF document text
    • https://fomodaduvi.weebly.com/uploads/1/3/4/7/134700625/dufijinowilete_xonuledoxosutod_fejiretisip_pijada.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/5fc7adb7791da6493f6bdfc1/t/5fcfadea7cc0b10a0adc298f/1607445995532/84402044930.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/adobe_acrobat_pro_batch_convert_to_word.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/9336670683.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/wei_li_acupuncture.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/manual_de_borland_c_5._02.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc51c99c6d96458363d5195/t/5fd18c02ad61ab583183e320/1607568389515/hockey_quiz_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/derezofafusivomuju.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/cms_reporting_restraint_deaths.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/nagifofejuladinunubudukof.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_off0001020e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020E 5216 bytes
SHA-256: a80a11ecd6fea556d2630b124c96bd1cb04d8ef34e6274158bd7c38ba931481f
font_01_sfnt_off000113d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D1 10460 bytes
SHA-256: 56fd656d7cdfc28ff1307be859452bd792e59e968d8d7d752d0b3ec6a45cfe96

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