Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0c0ec9b105b23fc…

MALICIOUS

PDF

73.7 KB Created: 2021-03-14 14:09:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b514773de550f70ec15b73b2b4cac306 SHA-1: cbb3a17e0e5d5105b66e5087e1ad5ce5e79a3134 SHA-256: f0c0ec9b105b23fccaa938440a6421f4bf8ec225267201c583b8f3e295c58e7a
66 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that redirect to potentially malicious domains, masquerading as a useful document. The ML classifier strongly indicates malicious intent, and the PDF structure suggests it's part of a link farm designed to distribute malware or phish users. No scripts were extracted, but the presence of external URIs points to a download or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://maypoin.ru/award?keyword=machine+embroidery+thread+conversion+chart+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4424666/normal_60350e4755123.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383321/normal_5ff22c03b3c37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410204/normal_5fd1f18b31f23.pdfIn PDF document text
    • http://sibatike.getenjoyment.net/math_shapes_worksheets_2nd_grade.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/42535558692.pdfIn PDF document text
    • http://dazefoxezizu.iblogger.org/50286043187.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418401/normal_602be7b8ea1ac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://46a1ac71-481d-4a85-b709-d40f3a189542.filesusr.com/ugd/143c98_71c9e0411e3f4117a0a36d347390ae41.pdf?index=trueIn PDF document text
    • https://d1b33a7b-cde1-45d4-bc15-d4d3b6236ac5.filesusr.com/ugd/1d64af_9ee287ef58c44c96b343459f63b2fa03.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zowibatev/adobe_audition_free_latest_version.pdfIn PDF document text
    • https://5c90cfa9-af55-48e2-9430-1f3580382729.filesusr.com/ugd/e2b09b_964201ebf10c4adc8ff7557f40c05c44.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/666d3b2d-da7f-4ff3-817c-62c1214ce4a8/hull_options_futures_and_other_derivatives_10th_edition_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/how_bad_could_i_possibly_be_lyrics.pdfIn PDF document text
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_0915a0aba94b47808d327e80847a61a7.pdf?index=trueIn PDF document text
    • https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_5d423910f54f4e608e9198b3c32c367e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jebokizez/9624487191.pdfIn PDF document text
    • http://bevonox.epizy.com/pokemon_emerald_rom_for_android_free.pdfIn PDF document text
    • http://pasobopupolom.rf.gd/44445961867.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13d3e31d-6848-4b23-a870-bd19e0dccc1e/divina_commedia_inferno_canto_3_riassunto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cedd57a-ab5d-477a-b6d9-342fe3c46ec8/10436920205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c1a3b52-5896-42a3-81bd-97088b8c8419/torelawufureduruwulutiwiz.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_off0000e322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE322 5672 bytes
SHA-256: d5935b58cc9534e2fc72eda5d4c7aae61fbf31d42028efe3edd84be547bbc047
font_01_sfnt_off0000f650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF650 10288 bytes
SHA-256: 46bf8309c418fc6e9e61e099d3259674d18db6576447d4f89d142bed135e4961

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