Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2dce44b1f9b617…

MALICIOUS

PDF

93.4 KB Created: 2021-05-14 00:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 02cc877052fdc95391202d19eeecb45e SHA-1: c0d2aa0405d63c1a02952124b6e10593346c9096 SHA-256: ed2dce44b1f9b617bced4a6a092420a6790c3c3bdd21e80e110cec00a84d3b3b
126 Risk Score

Malware Insights

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

This PDF document contains numerous links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The primary malicious URL, 'https://resalured.ru/strik?utm_term=what+is+the+difference+between+wd+my+passport+and+wd+elements', is likely part of a phishing or scam campaign. While no scripts were directly extracted, the PDF structure and extensive link farm heuristics indicate a malicious intent to redirect users to potentially harmful content.

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 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://resalured.ru/strik?utm_term=what+is+the+difference+between+wd+my+passport+and+wd+elements PDF link annotation
    • http://kakolamilasaru.medianewsonline.com/capitalization_quiz_with_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382406/normal_606b3de6c0bc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451039/normal_6052f656b476d.pdfIn PDF document text
    • https://cdn.sqhk.co/madilaxetevo/YibFjf5/color_galaxy_live_wallpaper_water.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/baby_name_list_in_tamil_girl.pdfIn PDF document text
    • https://cdn.sqhk.co/bupipusojok/thnehfJ/88066842143.pdfIn PDF document text
    • https://cdn.sqhk.co/pibepufas/Vggeute/cinelli_hobootleg_geo_size_guide.pdfIn PDF document text
    • http://pedugubugof.mywebcommunity.org/wegomuzupukul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/ms_word_mailing_labels_from_excel_spreadsheet.pdfIn PDF document text
    • http://visevagopar.onlinewebshop.net/business_communication_notes_for_bca.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/srimad_bhagavata_purana_in_kannada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63da194c-63cc-4a46-a332-4298ae109c7d/sigma_1009_turn_off.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5dfba4d-eb32-431a-9748-c1a9a3dc09af/janupinipugixovap.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/mcgraw_hill_my_math_volume_2_answer_key_grade_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66a53a9f-49f5-4179-8199-f69f2a0e35ea/nj_transit_bus_card_cost.pdfIn PDF document text
    • http://bujijawuta.atwebpages.com/38890730928.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF435 5528 bytes
SHA-256: 37112379d27a139e54d8f9f6ab3bea144d72a855c5474434a44e36914f7ed4e6
font_01_sfnt_off000106de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106DE 11688 bytes
SHA-256: 8bd6e20e923763bcfb2924c47f68848675af8f5da24264f3a5428f2d7c13fcc0
font_02_sfnt_off00012ef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF2 16580 bytes
SHA-256: 11f175635767ba51658b44bf7c5dca5c1e248d2b662f7a33361a5386cc698eac
font_03_sfnt_off000145b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145B4 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
font_04_sfnt_off000153b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153B5 2832 bytes
SHA-256: d7a1248cabf161ff78a072bd924b98f1b4e551660f4e151c9433689786990c0c
font_05_sfnt_off00015ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EF0 1736 bytes
SHA-256: 74be5bc4d46f64e5c506ae1006f7022dc98ebf960e37c7bf417c2027ca73106d