Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a0236d823c2a39…

MALICIOUS

PDF

95.1 KB Created: 2021-04-02 07:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3990706b4cbfd3fa94aecd30297e01bb SHA-1: 5bb560a95111ef67bb686d935da42ab0ed332716 SHA-256: 96a0236d823c2a39fcb9ae7e7ca245ede23799fc6e81a563980ed64cd19e11bd
66 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://nipisod.ru/123?utm_term=aha+resuscitation+guidelines+2019 PDF link annotation
    • http://mgacessoria.online/38225233434swogw.pdfIn PDF document text
    • http://munupesifak.22web.org/dateline_male_reporters.pdfIn PDF document text
    • http://ladiluvame.mypressonline.com/disikuwekotale.pdfIn PDF document text
    • http://bikelumonekodex.mygamesonline.org/bomabefatog.pdfIn PDF document text
    • https://newakikijako.weebly.com/uploads/1/3/4/3/134351088/pesebi.pdfIn PDF document text
    • http://salonop.xyz/wuwegegubltbgb.pdfIn PDF document text
    • http://13millions.store/391399747226nxir.pdfIn PDF document text
    • http://hdvideo.design/depadiraworapemy5kt2.pdfIn PDF document text
    • http://fozovozazu.iblogger.org/31331358134.pdfIn PDF document text
    • http://opit.space/9277177476637pfx.pdfIn PDF document text
    • https://pumaxodevuk.weebly.com/uploads/1/3/1/8/131872084/sisew.pdfIn PDF document text
    • http://pitupunum.iblogger.org/elapsed_time_word_problems_worksheets_4th_grade.pdfIn PDF document text
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/7738413.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pejibuturu.epizy.com/slick_rick_children_s_story.pdfIn PDF document text
    • http://mevalegija.rf.gd/spanish_demonstrative_adjectives_worksheets.pdfIn PDF document text
    • http://fujesotes.epizy.com/wobajizikev.pdfIn PDF document text
    • http://lerakegubonigob.epizy.com/changes_an_anthology_of_short_stories_by_b_walter.pdfIn PDF document text
    • http://senawoxagijajo.onlinewebshop.net/pejaler.pdfIn PDF document text
    • http://luxakekiketu.epizy.com/guide_log_book_in_malayalam.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_off00013534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13534 5672 bytes
SHA-256: ed1b85a9108eb8ce715b6952c1431d03183d0b22e2249f7478a60e22ac756fce
font_01_sfnt_off00014877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14877 11180 bytes
SHA-256: 26fcadd030b860c1751ab26ea083701955ca4194ce991c5a38c2ea2fc7dfa8a0