Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbb5c62b59f295bd…

MALICIOUS

PDF

77.5 KB Created: 2021-04-14 23:12:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 43a5c35c3da9dbba80d95e98adaab5cb SHA-1: 1c031cd7070b99a3458568546a92960b9f66e149 SHA-256: bbb5c62b59f295bd7ed16e5e09e0a364b84f3816b2139e446284c0c092d872af
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9993

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://bologen.ru/strik?utm_term=what+is+a+good+christmas+gift+for+boss PDF link annotation
    • https://nutifikidejuz.weebly.com/uploads/1/3/4/3/134347692/4621761.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412996/normal_6058da5d5c549.pdfIn PDF document text
    • http://fezatubiwe.getenjoyment.net/la_armadura_de_dios_estudio_biblico.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/essential_mathematics_for_economic_analysis_download.pdfIn PDF document text
    • https://saniluje.weebly.com/uploads/1/3/4/3/134323688/murajeviz-vadubat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453889/normal_5fe0a7df96cff.pdfIn PDF document text
    • https://fatibetoliwan.weebly.com/uploads/1/3/4/7/134731660/b6fe58473bd2.pdfIn PDF document text
    • http://bagomebefekixob.getenjoyment.net/jekiwakidamoxoxawemew.pdfIn PDF document text
    • http://fejekadiwoxobiz.getenjoyment.net/list_of_antonyms_in_english.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492575/normal_6029ee3f3d549.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405184/normal_5fd05f7c4bb03.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/lijulijowivaze/list_of_former_british_territories.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/mercruiser_5.0_mpi_260_hp_-_alpha_one.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/representative_payee_report_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/the_best_free_daw_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/modos_de_produccin_comunidad_primitiva_esclavismo_feudalismo_capitalismo_socialismo.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/buku_tafsir_mimpi_togel_2d_bergambar.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/dingbats_answers_level_15.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/75546110783.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/android_tv_cannot_install_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/mumiraworugudugi.pdfIn PDF document text
    • http://gurabagoderes.atwebpages.com/pejudubefepe.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/clangers_sheet_music.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_off0000ef57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF57 5556 bytes
SHA-256: 88fd1e7e593c56c4defde305c0f25e9871f7e28339d2efd533e96db9b675c099
font_01_sfnt_off0001021b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021B 11280 bytes
SHA-256: 1d22709b8fd369ec46a499f24e1219719d37911d00004c9fd5e6d0288994f993

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