Malicious PDF — malware analysis report

Static analysis result for SHA-256 4daa9e80ccb752c0…

MALICIOUS

PDF

65.4 KB Created: 2021-03-11 20:13:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4f848760a37e598349ceb617bc72a170 SHA-1: 8f53d368218317826efa503fc011bbdc0ecbb7b0 SHA-256: 4daa9e80ccb752c0ca97341db8022fe5a04a08f5da6f81cf235c606a510e0a64
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/123?utm_term=blender+3d++softonic PDF link annotation
    • http://dolinunuridaku.iblogger.org/how_to_get_a_postcode_in_ireland.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/wulagisi/how_many_scoops_of_coffee_for_6_cups_cuisinart.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/blue_clean_pressure_washer_383l.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/brother_ls_1520_bobbin_case.pdfIn PDF document text
    • https://40ba1f7a-6e91-49bb-bbb8-dfbb40a2bc60.filesusr.com/ugd/22bf55_5dc6cb50937f4c04b575805066c84d96.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/food_chain_workers_alliance_report.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/cellular_respiration_and_fermentation_lab_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/jigupodelew.pdfIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_76a8fbec8cdb452eac61bc10637431e7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bokelur/excel_file_for_beginners.pdfIn PDF document text
    • https://61090d85-22e6-4724-b969-52a17785150c.filesusr.com/ugd/952c2e_dc10d152b0a14cc08160192837bbbb1a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/15738052561.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/california_dmv_renewal_form.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/blood_type_genetics_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/37808381223.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/pexuxula.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/exchange_server_2010_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/application_letter_for_internship_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/83418686510.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/pearl_of_great_price_neville_goddard.pdfIn PDF document text
    • https://ff9dba89-6132-4485-99c2-ace8a2453124.filesusr.com/ugd/c3f59f_d935ece7eaf14cdb8d4423405e5dcc33.pdf?index=trueIn PDF document text
    • http://zuxekesimulir.epizy.com/tagovixumoratar.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_off0000c448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC448 5016 bytes
SHA-256: ff4be3ab1734d1ab45b300793d0eb473a85f57f74dbce4f14371cebe9235d6da
font_01_sfnt_off0000d56d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD56D 10320 bytes
SHA-256: 7b8f628eda133c39383f1844a37892c7f6df58092207949d8a41b9aea83d89dd

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