Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aff91308201f32f…

MALICIOUS

PDF

77.7 KB Created: 2021-03-17 01:14:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 009911124cfcdb982fd13f92324df098 SHA-1: dcf81e53548ba96ccd3988916ce338f1a7e58ee1 SHA-256: 9aff91308201f32f05f24984c48b3973f7f4db328c7578b2848ec0d3f29905d8
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to artificially boost search engine rankings. The primary lure appears to be related to 'sleeping beauty waltz piano pdf', directing users to potentially malicious domains. While no scripts were explicitly extracted, the PDF structure and the presence of external links suggest an attempt to redirect users to malicious content, possibly leveraging embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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/award?keyword=sleeping+beauty+waltz+piano+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4452199/normal_5fec684c44a44.pdfIn PDF document text
    • https://cdn.sqhk.co/mepowokugo/G7iebyj/flappy_bird_hack_script.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405930/normal_5fe064bb20202.pdfIn PDF document text
    • https://cdn.sqhk.co/petawelesup/oieiaii/strategy_process_content_context_an_international_perspective_2010.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477155/normal_600b33533ec25.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/bMjfggG/background_eraser_tool_online_free_video.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/gumegulaxi/hitachi_c12rsh2_replacement_parts.pdfIn PDF document text
    • https://ba9dc33f-61c2-415e-8598-c57272458a21.filesusr.com/ugd/c05727_9f05d2b0ddb84d91a4647f76a52097c3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tapelu/lusetagagevudepekukedaji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/232381ec-2aa2-4ce4-aa35-d6a92c3113d9/vermont_castings_encore_2550_service_manual.pdfIn PDF document text
    • https://a181bb3e-7445-4f1f-a1cf-b2fe66c13e92.filesusr.com/ugd/91ce54_4323852f84334537afc4603d736ad07e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/059fd8f6-b5d6-43db-845a-c65cf6f23cb2/creative_writing_prompts_for_books.pdfIn PDF document text
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_39912e859c4f4df190e294da6f16a2c7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lanubili/graphing_inequalities_on_a_number_line_worksheet_kuta.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/zolov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31259dc2-3c5e-46a3-b262-3bb365e8f4cb/93901165586.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/16979307307.pdfIn PDF document text
    • https://0f4267a5-27df-427f-b7ff-de3c6d4a4cd0.filesusr.com/ugd/9e4921_47976e9d143a4bbda0fcf2fbd9214df4.pdf?index=trueIn PDF document text
    • https://12350a4d-732a-4148-85a7-4fa27f2a77ec.filesusr.com/ugd/17beed_fca0ff64be3a4502a862d7befb12bd26.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/taturi/pekovoxofomew.pdfIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/3618960270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01d6165d-aaee-45cd-b4de-d62fd4ed3104/powerflex_755tm_installation_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/asp.net_interview_questions_and_answers_for_5_years_experience.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8d20e16-056d-4346-a1ff-44ee2008b81c/coleman_saluspa_parts_amazon.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_off0000f315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF315 5424 bytes
SHA-256: b637847cc388fe65ca731554eef20f09e6bee78b07f56f83fa4906a21100a9da
font_01_sfnt_off000105c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C1 10456 bytes
SHA-256: 008bbc20545f87bd6238d77697b4669c59df576f141de1b92c709afbc888b390