Malicious PDF — malware analysis report

Static analysis result for SHA-256 45ee5435fffd54cc…

MALICIOUS

PDF

74.0 KB Created: 2021-03-24 16:24:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f4dc40c513f628758bd0234fbce7fe3f SHA-1: d7af59a3432ee43f21d577995ea9012d80464549 SHA-256: 45ee5435fffd54ccd1c94dad7ac041bd3a08e6b337f943d15feb34891ade63d6
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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/aws?utm_term=where+can+i+buy+a+yellow+rose+bush PDF link annotation
    • https://cdn.sqhk.co/pagozixupezi/OgcidzL/geretiporabonu.pdfIn PDF document text
    • https://cdn.sqhk.co/segidexu/jdiepUf/nakezegipabaseluzusedivu.pdfIn PDF document text
    • https://cdn.sqhk.co/tisumusef/6geUgib/taxewur.pdfIn PDF document text
    • http://card2card.live/sex_shop_coloring_bookspqi5d.pdfIn PDF document text
    • http://usacreditmonitoring.info/55421312469fcd0h.pdfIn PDF document text
    • https://kunexiravirub.weebly.com/uploads/1/3/5/3/135344507/mowasavokoluzebij.pdfIn PDF document text
    • https://suwelebebos.weebly.com/uploads/1/3/5/9/135959353/0c8e56dd38c1.pdfIn PDF document text
    • https://nagajaburelu.weebly.com/uploads/1/3/2/7/132740350/6679611.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/glkiijh/37947139217.pdfIn PDF document text
    • http://ashotik.space/prescription_for_nutritional_healing_5th_editionhtunp.pdfIn PDF document text
    • https://cdn.sqhk.co/devurekon/hd7ZJLL/how_to_report_moderated_multiple_regression.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/visagogijulep/dugatukoxot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cd68b6e-ead3-442e-b2c5-90dbb46d8fd7/internal_audit_salary_guide_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/website_development_quote_template.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/caracteristicas_de_un_buen_lider_cristiano_evangelico.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/warapubotexasawomo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/355191e5-7f35-4d03-953c-81b719e0bb85/salimejawopagudotimeritel.pdfIn PDF document text
    • https://s3.amazonaws.com/musokejixami/chemistry_class_10_icse_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/ejercicios_de_molaridad_soluciones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2f222cd-f837-48cc-866f-7bb46e395247/gabiviregimomu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/581e1088-d69e-41e3-92c7-52261cbb389b/wordpress_login_admin_not_working.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_off0000e4e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E4 5232 bytes
SHA-256: a01d48e8564016ca18a974547d2ccf03188f483f3975c8df29665f9a8c08873b
font_01_sfnt_off0000f6ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CA 10372 bytes
SHA-256: 703652eb8550ab78a5b1ba049722cf3b45fa9441c4a5b890274e42701f51c27f

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