Malicious PDF — malware analysis report

Static analysis result for SHA-256 e883dab6b36a9a9a…

MALICIOUS

PDF

76.4 KB Created: 2021-03-03 17:50:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: ea74be799722ef90aecea95b2863540f SHA-1: 1922447bea005d023f3458cdde86acc1bf9537df SHA-256: e883dab6b36a9a9a8f23fcf3868b62f810987a2832d23ac4891b7f31402fbba8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host many links, likely for phishing or malware distribution. The presence of external URIs and the overall detection score strongly point towards a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://xezojetit.ru/strik?utm_term=clases+de+guitarra+para+principiantes+desde+cero PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4495399/normal_602d8e85e1185.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420239/normal_5fd5f0cf68fb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467577/normal_601d850befa27.pdfIn PDF document text
    • http://matrixbicycles.com/how_many_calories_in_100g_lettucevn81d.pdfIn PDF document text
    • https://cdn.sqhk.co/zukuxenopo/i6LdBhc/ropanovajusetuxopixomude.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/hagjdqo/pse_archery_black_friday.pdfIn PDF document text
    • http://fortuneo.biz/lasusefananixrg.pdfIn PDF document text
    • http://rijesukedad.22web.org/68107078598.pdfIn PDF document text
    • http://wiinorama.fun/water_marble_manicure_tutorialy3diw.pdfIn PDF document text
    • http://opensoda.pro/who_is_queen_elizabeth_in_season_3_of_the_crownto0of.pdfIn PDF document text
    • http://serdyukov.pro/zoxomfzjnd.pdfIn PDF document text
    • http://unlockdeals.shop/ripazekuliwavezezex1hww2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fipiwafupogo.epizy.com/craap_test_worksheet_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/bisection_method_c.pdfIn PDF document text
    • http://fusarafabar.epizy.com/pdf_document_translation_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/table_of_contents_worksheet_for_grade_1.pdfIn PDF document text
    • http://xanatilaguweve.epizy.com/lopaterisimigukotitojes.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/will_there_be_a_3rd_fantastic_beasts_movie.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_off0000eb68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB68 5144 bytes
SHA-256: f896e742ca20208de1991710082671b928b9df5183589a31f96605122d6e8af2
font_01_sfnt_off0000fcf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF0 11644 bytes
SHA-256: d3b72ad4292558f6bdb2855c6065bf63fdb39a53e4232d9e54abf8b0503080f7

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