Malicious PDF — malware analysis report

Static analysis result for SHA-256 63b4433651943bb6…

MALICIOUS

PDF

76.6 KB Created: 2021-03-18 11:42:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5550c10e7e708d7765762210b17fc408 SHA-1: 1d286c7c8ff2739f0ebd4822bee562f488141d0f SHA-256: 63b4433651943bb6d3740101ca53335504458025645a5f350f20a2ff8333b835
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 0.9991

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://resalured.ru/123?utm_term=restaurant+formel+b PDF link annotation
    • https://cdn.sqhk.co/wazikunal/jbbWkdp/64876136819.pdfIn PDF document text
    • https://cdn.sqhk.co/wolebiduju/ecnc4ZP/cross_border_payments_fintech.pdfIn PDF document text
    • https://jesidovelagira.weebly.com/uploads/1/3/4/7/134705211/8356996.pdfIn PDF document text
    • https://woremudof.weebly.com/uploads/1/3/4/7/134701645/faroxiza-kopijipapopu-fixivivoxusesil-zisuraje.pdfIn PDF document text
    • https://bogilerilixami.weebly.com/uploads/1/3/5/3/135345361/3480036.pdfIn PDF document text
    • https://taxajoberaruvu.weebly.com/uploads/1/3/4/3/134320235/6678153.pdfIn PDF document text
    • https://cdn.sqhk.co/suwezuzifu/gciiR3T/idle_egg_tycoon_hack_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jogekiluse/hdrPji6/3d_snake._io_2019_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/baxajufim/fvShiOf/bnf_2017_free.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/jibgMRT/walmart_money_card_green_dot_bank_routing_number.pdfIn PDF document text
    • https://jufozawuvinuxak.weebly.com/uploads/1/3/5/3/135326647/4752861.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/gzgjgj8/92782229553.pdfIn PDF document text
    • https://cdn.sqhk.co/semiwewedazi/SdCrifY/rizupesesoriwomegupikur.pdfIn PDF document text
    • https://cdn.sqhk.co/mavozopofug/hjgi9ic/jitumumukegomomix.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/gogoxowiniza/minecraft_server_1._8._0.pdfIn PDF document text
    • https://s3.amazonaws.com/bagisi/android_9._0_pie_get_one_ui.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/84507268236.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/10015255779.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/tekopuzafulodupevibarowo.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/realidades_2_capitulo_1a_answers_page_10.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/25669467861.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/time_series_analysis_with_applications_in_r.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/fexovosuwapojepigotil.pdfIn PDF document text
    • https://s3.amazonaws.com/libosokune/gauge_sizes_sheet_metal.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_off0000ee64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE64 5060 bytes
SHA-256: ae46d6d49183d1e6c423593a467c2a80ded9b80219f24f0977023bc41c397c1d
font_01_sfnt_off0000ff89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF89 11336 bytes
SHA-256: 56b616ffc4de6b3c4a7b8c45490976b7f9bd21fe7fd35e791df2181e637d8a13

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