Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dd22d36d6279da2…

MALICIOUS

PDF

83.8 KB Created: 2021-03-30 13:00:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 69b7ba545387ebf027cf007d6fc9ce49 SHA-1: e3d38d5e76de2ab874f64496ed277bc282ece807 SHA-256: 2dd22d36d6279da2700a221128ea91dfb42910e8c7fa1aec75f2965ca07fb7b4
126 Risk Score

Malware Insights

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

The PDF contains multiple external links, with one specifically targeting search terms related to job interviews, suggesting a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to trick users into visiting malicious sites.

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://baarspo.ru/award?keyword=excel+interview+questions+and+answers+for+freshers+pdf PDF link annotation
    • http://lifelalulenomip.mygamesonline.org/89271392595.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408873/normal_5fc68271b53f5.pdfIn PDF document text
    • http://wegaturagifo.getenjoyment.net/microscopio_optico_partes_y_funciones.pdfIn PDF document text
    • http://tazizaj.iblogger.org/attestation_pole_emploi_vierge_remplissable.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453332/normal_605680506d731.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378151/normal_5fd5f5ef9e938.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389570/normal_604b32bde78ce.pdfIn PDF document text
    • https://sasogobol.weebly.com/uploads/1/3/4/3/134387633/tetisupogiw_palijuno_zasolafewub_razexigokabes.pdfIn PDF document text
    • https://wetogukonitama.weebly.com/uploads/1/3/3/9/133997956/joliteledevozadizupi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389570/normal_600b44f3901a3.pdfIn PDF document text
    • http://medazuxa.mywebcommunity.org/oracle_12c_sql_chapter_1_answers.pdfIn PDF document text
    • https://pabebubi.weebly.com/uploads/1/3/2/6/132695301/3649207.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4be8a7ba-6c9a-47a4-99fc-a5961b41a404.filesusr.com/ugd/132250_e4e092328e3443239088b4a035f633d5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nisoxow/galacticraft_1._12._2_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/grounded_theory_researchers_use_open_coding_for_what.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/fuwaxomep.pdfIn PDF document text
    • https://fdb4f28e-c637-431f-967d-457feef73efb.filesusr.com/ugd/cf5aa9_54f484f7b7dd4e9bac4f08d648778db1.pdf?index=trueIn PDF document text
    • http://jegowijuvu.epizy.com/tipigivozivufejudazisol.pdfIn PDF document text
    • http://xinifaduzinuvu.onlinewebshop.net/advantages_and_disadvantages_of_vertical_integration.pdfIn PDF document text
    • https://e8b83640-91e4-44a0-a69f-c2468797902f.filesusr.com/ugd/ee4a13_b0f54fb27e0445cd9f376b5ce7a2fe5f.pdf?index=trueIn 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_off00010bad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAD 5544 bytes
SHA-256: f509fb79d8ea2e7463cf176822c29b2e1e38e21ff4c8d814f01a0401fb063432
font_01_sfnt_off00011e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E9F 10592 bytes
SHA-256: 4e5ee5dc4998646ef9336c5d75c5da1768467e102deaf17ce283c70c82856937

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