Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ba64d082b337821…

MALICIOUS

PDF

95.6 KB Created: 2021-03-08 12:25:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 878578c2ea73c68841602b203e003928 SHA-1: 408fec53b4da42b11979dc594f97d1fa15a63f8e SHA-256: 8ba64d082b33782125e15acdd287cc18873783ffa7dc372270ae98cef22a0825
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 of which point to potentially malicious domains, indicating a link farm or phishing attempt. The heuristic 'PDF_SEO_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly suggest malicious intent. While no scripts were directly extracted, the presence of embedded URLs and the overall structure point towards a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/123?utm_term=heparin+resistance+guidelines PDF link annotation
    • http://instasurprise.online/predator_6500_watt_generator_manualq54gf.pdfIn PDF document text
    • http://zabolojisag.getenjoyment.net/fewovokobefunanusaferusiz.pdfIn PDF document text
    • http://joretuvivofip.22web.org/durga_mata_ka_bhakti_gana.pdfIn PDF document text
    • http://wabaxifejem.sportsontheweb.net/gugaxezebinana.pdfIn PDF document text
    • http://lobulezinovux.medianewsonline.com/logical_functions_in_excel_2020_with_examples.pdfIn PDF document text
    • http://devovonabukuzim.66ghz.com/brother_dcp-_l2520d_drivers.pdfIn PDF document text
    • http://freefire-gifts.com/5440163725201ucp.pdfIn PDF document text
    • http://matrixbicycles.com/number_system_conversion_with_solutionmnel8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://acd80754-3b70-42c6-a60f-3489f6261da4.filesusr.com/ugd/f1780b_18c79e69b76542b6aa5ab1c018ab8ea2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/25408714526.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/how_to_eat_fried_worms_read_aloud_chapter_1.pdfIn PDF document text
    • https://7a579b3f-ce96-4c66-abdc-991530493d29.filesusr.com/ugd/010c6b_349d31005a0645c7beb44b26c7bbe091.pdf?index=trueIn PDF document text
    • http://rirazito.epizy.com/printable_handwriting_sheets_for_second_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/19811099612.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/mezazoxi.pdfIn PDF document text
    • https://1527c8d3-3321-4e9f-872f-e2bebb57bac2.filesusr.com/ugd/bf2d42_06205eb737cb4138ae5af3013a9eecb7.pdf?index=trueIn PDF document text
    • http://vidabovon.epizy.com/free_christmas_sheet_music_for_clarinet.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/hollander_parts_interchange_books.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/consonant_blends_with_short_vowels_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/65096569197.pdfIn PDF document text
    • http://gadoxijumulop.epizy.com/look_at_me_meme_template.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_off00012eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EAF 5204 bytes
SHA-256: dbf17a9b938fecb21f0a2a0d059eda1040c090cddb2abc86e412bb4fcd65fe16
font_01_sfnt_off00014069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14069 15816 bytes
SHA-256: 473bc000a8e9fe504033943bc7b348704470031f7e97c4001d277abb31d29faa

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