Malicious PDF — malware analysis report

Static analysis result for SHA-256 05fd84a119b8655d…

MALICIOUS

PDF

69.0 KB Created: 2020-12-22 13:49:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 00f96810f4b684afb56a716af395dab7 SHA-1: 7c4d679236560c6d74db58a6fabcf4cf972fe043 SHA-256: 05fd84a119b8655da63a9a73a5cc3f742b0048e1a93a60e09900a4312de30d05
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are benign, but one suspicious URL (traffset.ru) is present and flagged as unknown reputation. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external PDF link farm, suggesting a phishing or SEO manipulation attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffset.ru/strik?utm_term=wordpress+api+plugins_url PDF link annotation
    • https://bomexufimewaw.weebly.com/uploads/1/3/4/5/134517434/jogudufeba-famubunazab-dofemowizebixaj-fifoxek.pdfIn PDF document text
    • https://fevixivosetakub.weebly.com/uploads/1/3/2/6/132681861/e43bbf90.pdfIn PDF document text
    • https://jimamejovegevag.weebly.com/uploads/1/3/4/5/134593921/6610495.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/5fc00635ff13940aa23ad6dd/t/5fc47cab4e98326c02a14f31/1606712491451/seaborn_violin_plot_remove_outliers.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/cavinkare_annual_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/25765944853.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd37863f59a2572d8ffde5/t/5fdddbad892c8943b09e04a3/1608375218971/artemis_roman_form.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/wow_tbc_rogue_leveling_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/alkyne_nanh2_ch33cbr.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4f56dd26ff1194f8deacd/t/5fcb08eb1ef6d1662fe7d5b9/1607141611872/rakatevefaweror.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_off0000cc91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC91 5172 bytes
SHA-256: fc7fe8270a7e573f085e501642ff9b352999e7564290da644ebcbf4c7f00a22a
font_01_sfnt_off0000de52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE52 12764 bytes
SHA-256: 003e75778cbb853a83310ef393f5cd282259e61f227ce305532665c122011b30

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