Malicious PDF — malware analysis report

Static analysis result for SHA-256 f063ea586a9e6ef7…

MALICIOUS

PDF

78.8 KB Created: 2021-04-05 09:16:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 789fd63e3b12977e7c92ff52c0a6e1c0 SHA-1: 58a60c45bc4b8154160f04792e06f0ba8f0834ae SHA-256: f063ea586a9e6ef7af2476c84691f966cea2614d399d0123a21ffbfe247d5b67
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9967

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 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/strik?utm_term=martin+luther+king+mountaintop+speech+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4473622/normal_5ffbc18a060ca.pdfIn PDF document text
    • http://mizarofu.22web.org/super_smash_flash_2_for_chromebook.pdfIn PDF document text
    • http://elinekici.online/fichas_de_lectura_para_primer_grado69lzc.pdfIn PDF document text
    • http://azules.ru/98670573170zme52.pdfIn PDF document text
    • http://fafigowe.22web.org/strategic_business_management_books.pdfIn PDF document text
    • http://fabanefefori.22web.org/bivizojimat.pdfIn PDF document text
    • http://zhenskiizhurnal.ru/58367089378ct4jc.pdfIn PDF document text
    • http://xuripadage.22web.org/how_do_you_convert_britax_frontier_to_booster.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494673/normal_5fe06d9b1c438.pdfIn PDF document text
    • http://reduslimitalia-ufficiale.site/making_android_app_using_python9i5e9.pdfIn PDF document text
    • http://cardioactiveufficiale.site/cfms_user_creation_form_biharziky7.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/xezujuxoz/vilotewekobakifikusut.pdfIn PDF document text
    • https://89e5ed4a-33eb-42a6-b5f1-9fc07ea1e15b.filesusr.com/ugd/ff68bb_59588ab7dae4476fbd00ee742fa940a0.pdf?index=trueIn PDF document text
    • http://gikuxedikejoba.epizy.com/queen_of_the_tearling_film_release_date.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/which_companies_are_listed_in_nse.pdfIn PDF document text
    • http://jeragapa.epizy.com/baillie_gifford_american_fund_factsheet.pdfIn PDF document text
    • https://ed8bc375-cd54-49ab-9ddb-988cb5b2fc3d.filesusr.com/ugd/3f3824_62e8a66dc2d046bb8fad3ca839197acb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/pagegibezime.pdfIn PDF document text
    • https://6cdf8c5e-36a0-4b6d-987f-32d3d50030cd.filesusr.com/ugd/3c2e2e_1ebfb99217d943f18968066045a61059.pdf?index=trueIn PDF document text
    • http://puvujisedine.rf.gd/zaroluteje.pdfIn PDF document text
    • http://pozirumine.epizy.com/56227784410.pdfIn PDF document text
    • https://86042ffc-9b62-460b-8552-fb2522205a17.filesusr.com/ugd/4f92c1_aaec5fc85cd24a19b1614e68128f513e.pdf?index=trueIn PDF document text
    • https://c941d99d-b58b-4215-81ce-525e38db2b81.filesusr.com/ugd/2dc4cf_72fde404459e4865a658c5afa01e7dda.pdf?index=trueIn PDF document text
    • http://vosimamasi.epizy.com/apartment_design_guide_part_2.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/vuvufepijox.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/49575720679.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_off0000f698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF698 5640 bytes
SHA-256: a2ef098f2b277f5d233ea4cc961c3c130c440e8d3128ab3342d5bb1453fc5246
font_01_sfnt_off000109a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A6 10508 bytes
SHA-256: 503dda9b422a5996bffd882393c7e4f8d4f3d995620c61dfc8813f40a5078e57

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