Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb96baa7e32dffd1…

MALICIOUS

PDF

84.4 KB Created: 2021-03-08 21:45:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 050a5d10a0f2aabf9554e008e9faca3c SHA-1: 2c0bbad3922af66e51f8e239baea7ea051e0af0c SHA-256: bb96baa7e32dffd126c3bcf8be8be5589c57eef1102a6a4fad4be482af08290d
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 0.9998

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://resalured.ru/aws?utm_term=what+is+the+measure+of+a+great+manglesrt+%253D+degrees PDF link annotation
    • http://femonejigajape.mywebcommunity.org/what_is_the_definition_of_curriculum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473618/normal_602039502a50e.pdfIn PDF document text
    • http://siwupojotuj.getenjoyment.net/47589506420.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390999/normal_5fe47027e27cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://07bd7893-a6ec-44d5-90fe-c719e602c0bd.filesusr.com/ugd/aafaff_beb441e602a944d192a315150b9f6d5f.pdf?index=trueIn PDF document text
    • https://f6180879-d31b-499c-8e42-fead7842c491.filesusr.com/ugd/007227_761457aa454e491ab98c64a3cabbc3b8.pdf?index=trueIn PDF document text
    • https://a54de82d-0003-4787-801b-d7ee719c780a.filesusr.com/ugd/8d57bd_e5edff0eb2e244e2be60393c773cebda.pdf?index=trueIn PDF document text
    • https://050a9d39-d8a1-4107-8be8-b2b70b72e454.filesusr.com/ugd/5262df_d29d01a9620e4edfaacc46ce975f57cc.pdf?index=trueIn PDF document text
    • http://zotubune.myartsonline.com/the_monkey_king_movie_2019.pdfIn PDF document text
    • http://gevejonitu.onlinewebshop.net/goalrilla_54_in-ground_basketball_hoop_installation_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/blandad_form_subtraktion.pdfIn PDF document text
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_ecc76efea182402389842dc46990b5f5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/topography_of_terror_guided_tour.pdfIn PDF document text
    • http://nukilaba.myartsonline.com/mapozisezopuxolo.pdfIn PDF document text
    • https://ef9935f7-a918-44a1-999f-f1d50a45e4a7.filesusr.com/ugd/b463f2_6625693f55554ce6b3b284ac382c5b43.pdf?index=trueIn PDF document text
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_a7a8751c33c248efb3f24c783880c38d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/how_to_eject_dvd_from_playstation_3.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2C 5260 bytes
SHA-256: d23c6db1962d7ccec355d3f113a85cdf2a83fcf9c1bf4cb17111a945914505e1
font_01_sfnt_off000110f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F6 10944 bytes
SHA-256: f9cffee27f216b0380836b1fe79983dd22a05a85c40c48c1291cb658b5c65897
font_02_sfnt_off0001363c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1363C 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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