Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f6b154fdd4639d9…

MALICIOUS

PDF

77.4 KB Created: 2021-04-07 23:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e3782588d5897738029507c739086bd4 SHA-1: 3d6e199b6ac6e06920bc25a5522fb0a436aef4df SHA-256: 3f6b154fdd4639d984f03183fb1ca15b60beac9beeeffb39605b6b832293038d
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site for further exploitation. The document body, though heavily obfuscated, appears to contain metadata related to the 'wkhtmltopdf' tool and a podcast title, suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/strik?utm_term=american+indian+history+podcast PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4497395/normal_5fcfa7fc480f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380214/normal_6023b81ae2da1.pdfIn PDF document text
    • http://theporte.xyz/how_to_get_gdp_datarj7sm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383128/normal_605ca35a2fecc.pdfIn PDF document text
    • http://ens-pictures.ru/a_grammar_of_motives_summaryt56l1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445736/normal_6006c5905f108.pdfIn PDF document text
    • http://good-production16.site/14341264144s31sv.pdfIn PDF document text
    • http://dmgameplan.com/karcher_hds_610_service_manualin4pu.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/fizup/how_to_use_porter_cable_brad_nailer.pdfIn PDF document text
    • http://xizokenimufewom.atwebpages.com/zonati.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/lazezodoruvetoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fc4e69c-a46d-44d8-bb44-212e1e5bf7d8/learning_python_powerful_object-oriented_programming_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b304c11a-2b28-4db1-8bb0-5fbc3384603e/what_is_the_secret_menu_at_wendys.pdfIn PDF document text
    • http://wodowepakimeko.onlinewebshop.net/concerning_the_spiritual_in_art_kandinsky.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/sanavimademerupamuze.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/braun_4262_food_processor_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81396785-cad6-4d74-a0a6-47718e27c880/baby_got_back_release.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/papetew.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/textbook_of_canadian_medical-surgical_nursing_apa_citation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67bad3ce-0252-494d-bf3b-3b18a7bfcbcf/jokabowaketimobototut.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/58678888606.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/hypo_and_hypersecretion_of_growth_hormone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e19cc842-9c6b-4649-92db-78cb31f1cb0e/ridamabuvaxasuxumid.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_off0000f0b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B3 5372 bytes
SHA-256: bfdabef1528f05cc50ed24aa1a239829bdc281645b3e1f54097f282d7ad9cee9
font_01_sfnt_off000102d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D3 11032 bytes
SHA-256: 3c891dd97c8c037b1f5e8c075328c097b611d536a7d499908cef6f7e899af1c1

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