Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecaa9fc314403fed…

MALICIOUS

PDF

78.7 KB Created: 2021-03-21 04:14:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: d0fcdf9a4eabc5c2f1e14c5ae99db48c SHA-1: e94c6d9c120d0923f3bd23a8465dc0b52ebf513c SHA-256: ecaa9fc314403fed37fe9dd9ce8c7432ce4a62dfad5eb3d381d1fe99dad9559d
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to potentially malicious or redirector infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate a deliberate attempt to host or link to malicious content. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to external malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crophysi.ru/award?keyword=advantages+and+disadvantages+of+action+research+design+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369525/normal_6039a85adee48.pdfIn PDF document text
    • http://dupamineni.medianewsonline.com/famusokowabog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413227/normal_6039433959fe7.pdfIn PDF document text
    • https://gagegopered.weebly.com/uploads/1/3/4/8/134880179/1815692.pdfIn PDF document text
    • https://lurugidapu.weebly.com/uploads/1/3/4/3/134315770/9275309.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490133/normal_6003f91f429e1.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/how_to_install_games_on_the_ti_84_plus_ce.pdfIn PDF document text
    • http://gubixazolela.sportsontheweb.net/mesorezowewugaxesogo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500440/normal_604947bc62301.pdfIn PDF document text
    • https://nogusuxewi.weebly.com/uploads/1/3/1/4/131438155/nolakipe_makereril.pdfIn PDF document text
    • http://podifodosej.scienceontheweb.net/pdf_image_to_word_converter_online_free_editable.pdfIn PDF document text
    • https://nasesugafod.weebly.com/uploads/1/3/5/3/135387958/8557675.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/posufij/ashoka_mp4_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/what_is_a_branch_in_a_decision_tree_model.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f72a5616-af79-4a06-9d52-91ee23786ce1/93131029971.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/after_sales_performance_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/dobikasukavu/viva_video_maker_app_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7baf6491-4e27-4dc4-9e85-cbed64824668/how_to_reset_a_galaxy_tablet_to_factory_settings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9dc5a43-dbd7-436b-90ec-10a904b63639/kavububefimij.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/girazotun.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/download_divergent_movie_free_online.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/wwe_champions_2019_mod_apk_latest_version.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/tubemate_video_er_app_latest_version.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_off0000f3c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C7 5436 bytes
SHA-256: 2d43df7d75715aa15f543ca29fae092287fa47c20b587fb39144306006063b27
font_01_sfnt_off0001064d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064D 11320 bytes
SHA-256: 721accb947ca5c7a222c431a08db430bb8f160eea48c56dfa8ed398c38cbff86

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