Malicious PDF — malware analysis report

Static analysis result for SHA-256 7990b011caf547db…

MALICIOUS

PDF

73.2 KB Created: 2021-03-18 18:11:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 7f843b80b07e268ba1d47e954f4ac676 SHA-1: b8a2c60a497b0e0139e0a73ebe213b6e51145dd0 SHA-256: 7990b011caf547db8a7b229bf75d7b46a6c982ccc701a1e2ca0e898aa7d7eddc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating high maliciousness. The presence of a 'download button' lure and a large number of external links, including one pointing to a potential phishing keyword, strongly suggests a malicious intent to trick users into downloading further content or visiting malicious sites. The file's structure also indicates it's part of a link farm, likely for SEO manipulation or to distribute malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dugedepap.ru/wix?keyword=ben+carson+gifted+hands+book+pdf+download PDF link annotation
    • http://torchland.xyz/sedupekawumusemaribid2ptem.pdfIn PDF document text
    • http://wasatosu.sportsontheweb.net/fiwivu.pdfIn PDF document text
    • http://wopexobow.mywebcommunity.org/sekiwunutimuvuv.pdfIn PDF document text
    • http://fashion-deals.xyz/7892370659502z5z.pdfIn PDF document text
    • http://levotavo.scienceontheweb.net/attitude_magazine_free_download.pdfIn PDF document text
    • http://reduslim-buy.site/tubidy_free_mp3_downloads_for_pcbfabo.pdfIn PDF document text
    • https://cdn.sqhk.co/labokezugumu/hgFijic/bawesuvobanimuzeva.pdfIn PDF document text
    • http://wellwork.site/2702843680z4wc7.pdfIn PDF document text
    • https://cdn.sqhk.co/janawezexoj/cNCdYcW/72558104853.pdfIn PDF document text
    • https://cdn.sqhk.co/mojuzizimu/hfggBj4/big_rigs_for_sale_in_tennessee.pdfIn PDF document text
    • http://nibelv.xyz/81896497459ehdvz.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/debiwelof/google_analytics_search_console_report.pdfIn PDF document text
    • http://kozogasivufi.myartsonline.com/64914163475.pdfIn PDF document text
    • https://1c684d3d-b1aa-4d58-8f8e-408f9cf37fac.filesusr.com/ugd/64d889_75e291fe15924afba4fe2fcc2d19e107.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/detutonuzirewejizov.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/tukanusivowemobafozurom.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/2415372167.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/escape_room_app_answers_level_21.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/home_design_mod_apk_rexdl.pdfIn PDF document text
    • https://0c2a7d7b-be9d-4ef2-a94c-09ca905cc17d.filesusr.com/ugd/7d21c0_464b16b74ee24584af7d598bc769b515.pdf?index=trueIn 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_off0000dd71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD71 5760 bytes
SHA-256: 5e09cb723241b966fe3ff9ac635663b53b8206bbce42b69da0b78eeeb609b055
font_01_sfnt_off0000f113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF113 11112 bytes
SHA-256: 20c016de9c41b92854900a1e03beb48f93183cf814bdbb5cae1c4ffbf0eb92e4

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