Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d614b2595028b54…

MALICIOUS

PDF

83.1 KB Created: 2021-04-16 17:23:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4ec6887623257efcbcff95e9ca5dd6ca SHA-1: eb80656e7b171c1a77f6efbc348aff292cf56b37 SHA-256: 7d614b2595028b5450398e9726265303899b09ac2b9953b1d1fea9d6f8bf9005
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files on different domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The embedded URLs and the nature of the heuristics suggest an attempt to manipulate search engine results or redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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.
  • 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://golowaki.ru/strik?utm_term=ti-83+plus+used+price PDF link annotation
    • http://realnoe-obshenie.online/xofojunopexen56tki.pdfIn PDF document text
    • http://pressit.space/47172474539033vt.pdfIn PDF document text
    • http://carinsusa.info/wapifupaborotazov9qh9.pdfIn PDF document text
    • https://ronukeva.weebly.com/uploads/1/3/5/3/135385202/544a72.pdfIn PDF document text
    • http://ar-foto.art/the_crown_season_1_castww28m.pdfIn PDF document text
    • http://liolika-rsya.ru/iifl_wealth_finance_annual_report8h7ak.pdfIn PDF document text
    • http://kdghy.online/45062451965rur72.pdfIn PDF document text
    • http://talemine.getenjoyment.net/siwinivizonijoguziga.pdfIn PDF document text
    • https://sajawibur.weebly.com/uploads/1/3/4/6/134631073/fapipa.pdfIn PDF document text
    • http://zhigina.ru/the_indigo_spell_downloadhse4i.pdfIn PDF document text
    • http://parkji5x.xyz/chelsea_cutler_the_reason_song9xnfx.pdfIn PDF document text
    • https://zuzedunili.weebly.com/uploads/1/3/4/4/134460484/sivop.pdfIn PDF document text
    • http://zujejilolo.scienceontheweb.net/tabela_de_cidos_e_bases_fortes_e_fracos.pdfIn PDF document text
    • https://nexojavadu.weebly.com/uploads/1/3/0/7/130775828/1997020.pdfIn PDF document text
    • http://eurozone.pro/remagelened8qdyt.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/wemofodi/sirekepape.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/canon_mp11dx_ribbon.pdfIn PDF document text
    • https://s3.amazonaws.com/bogijexu/persuasive_essay_topics_for_6th_grade_students.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/how_to_rotate_view_in_autocad_layout.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/94194140338.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/descargar_analyze_this_pro_apk.pdfIn PDF document text
    • http://bojepudadadax.atwebpages.com/vemidodejojapidosa.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/guruvinapogel.pdfIn PDF document text
    • http://muvamubas.atwebpages.com/manual_cade_simu_v3.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/where_was_the_end_of_last_of_the_mohicans_filmed.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA26 3048 bytes
SHA-256: f24418afde991e348e9fa02a9bcaee3fbd18cde993421a29031e4c00fc50a885
font_01_sfnt_off00010501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10501 5196 bytes
SHA-256: dd6b475ff62bad6333744f5257462bf65b129eb133d612fc8430be7943c86494
font_02_sfnt_off000116ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116CA 11504 bytes
SHA-256: a23ae29f6fbc3ffbbc7ef48d43a4015688d69d10c060341bbecac0da7ea5dce8

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