Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f226db7a35aa4f…

MALICIOUS

PDF

83.3 KB Created: 2021-03-27 23:40:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6d0148d9253e0de1c7b78a7b1a400a8d SHA-1: 548aefdd5db218309cccde1e321a176c22020a60 SHA-256: 47f226db7a35aa4f35fe653aabda98de0a21c345b6b8820c9e6ed46e84c33690
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-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://golowaki.ru/aws?utm_term=the+5th+wave+book+ending PDF link annotation
    • http://jobware.pro/94660573768y2g78.pdfIn PDF document text
    • http://giocodigital.website/1774202463s7g0.pdfIn PDF document text
    • http://jopagozopive.medianewsonline.com/78561527647.pdfIn PDF document text
    • http://islemleriniz.org/50767558651mxga4.pdfIn PDF document text
    • http://akvatehnika74.ru/saxiviwudogpivo.pdfIn PDF document text
    • http://about-fb-support.com/ritonojfufu.pdfIn PDF document text
    • http://lifeshop.pro/serta_adjustable_bed_headboard_kitrqqz9.pdfIn PDF document text
    • http://majexifavel.scienceontheweb.net/oxford_phonics_world_2_workbook_free_download.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/minabiwa/69265047226.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/free_microsoft_word_tax_invoice_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c113476c-6948-40fb-8f41-6340ec783c07/what_is_royal_hawaiian_sandalwood_hydrosol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d7c2257-9e58-44a0-91a9-d1031688060f/55246307692.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09fa969f-abea-482d-984b-dae0ff6f63ad/21125846258.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14861f1a-c9c1-4284-b6b0-e80af2fd0f74/27713003616.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/algebra_2_holt_online_textbook.pdfIn PDF document text
    • http://xinifaduzinuvu.onlinewebshop.net/telugu_biodata_format_for_marriage_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5257b3d-2423-4506-89ee-be7d2a3af1e6/sewing_books_for_beginners_nz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56c3b096-e937-49d6-8713-25106666e119/15357200837.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b3c8e0d-9730-4e35-83fb-58c9521ac977/45622764839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f8e1ed1-1faf-41ef-8a81-5c883aa0ed15/kotler_keller_marketing_management_15th_edition_ebook.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_off0001073c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073C 5208 bytes
SHA-256: a56200403a64327905870b0cf38a2bb16ffa8e5bc3b6c6c6da717e06e3d047f3
font_01_sfnt_off00011916.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11916 11284 bytes
SHA-256: 841cdab21892da4688143c18734732063412e6d54392d77016ae55b86b955ea6

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