Malicious PDF — malware analysis report

Static analysis result for SHA-256 291ea1e996244501…

MALICIOUS

PDF

101.1 KB Created: 2021-03-28 22:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 15da60628e1cd4b1f064719a47bea3cd SHA-1: 0150fec129485f6d6d126e44da72ebbd210e9ef5 SHA-256: 291ea1e996244501b045689ae809a7984e3fb89f80493c1fcb7921b9d943a086
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to 'zajinet.ru' which is flagged as a potential phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/wix?keyword=the+broadview+anthology+of+british+literature+the+victorian+era+pdf PDF link annotation
    • http://sosuziba.mypressonline.com/antennas_download_free.pdfIn PDF document text
    • http://botavubapisod.mywebcommunity.org/cisco_lab_manual.pdfIn PDF document text
    • http://neuroncraft.online/highway_safety_ratings_2020h4re5.pdfIn PDF document text
    • http://betflixguvenilirmi.com/sbir_submission_dates_202018ifl.pdfIn PDF document text
    • http://organize.shop/directv_remote_control_code_for_tcl_tvd7gvy.pdfIn PDF document text
    • http://fosipuzo.mypressonline.com/bajon.pdfIn PDF document text
    • http://trysalon.xyz/how_to_become_an_emergency_doctor_in_canadafiyey.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/jigezilor/37108407187.pdfIn PDF document text
    • http://judoxezoxo.rf.gd/31800197349.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb1bb4e0-9d29-4bc6-a9f3-fd25a51ea9a2/how_many_sustainable_development_goals_are_in_the_2030_agenda.pdfIn PDF document text
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_e5b1a2c6bff14d1cbce21eec21c45910.pdf?index=trueIn PDF document text
    • http://sowezenuvafe.epizy.com/african_boy_logo.pdfIn PDF document text
    • https://fe92b815-f0fe-4223-924b-659339f44b90.filesusr.com/ugd/8f64fc_943d9dc7781847e7bfb1eb4d3736d075.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jovekus/91956698008.pdfIn PDF document text
    • http://ririgigiwabub.epizy.com/redikizilotawis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af8bb489-599f-4f63-a533-5587d870f405/39016072663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3639a3fd-72a9-4e43-ade1-2b4568e6e662/camry_hybrid_2014_mpg.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/mifakegagulegigete.pdfIn PDF document text
    • https://aaf8962b-2ea5-4403-bfea-7c32f2b3f77e.filesusr.com/ugd/8f3a65_ef1bcc927fd14edb896c9b6c680487d7.pdf?index=trueIn PDF document text
    • http://nerezusilanake.atwebpages.com/blue_jackets_jersey_numbers.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_off00014afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AFA 5760 bytes
SHA-256: 59101b279ef8ef0dadcad820d11d2cfc6bc06f0ef0a7f0c1294bf189fd47ee27
font_01_sfnt_off00015eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EAA 11868 bytes
SHA-256: 43a4a6da8c045fd4bdf57109d164315d61984aa2a41b6b268587e112133366dc

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