Malicious PDF — malware analysis report

Static analysis result for SHA-256 26f7e25ef3fed10b…

MALICIOUS

PDF

81.1 KB Created: 2021-03-29 22:29:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 340384b9bbdb5d7940d5f87136c7ed07 SHA-1: 9d86550c774c7e86b17e2951237b2112722aa15e SHA-256: 26f7e25ef3fed10bf35e52d0cc4a34d9860a3811213b25e4d4ed813ce533444a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' heuristic and the ClamAV detection. The primary URL, 'https://xezojetit.ru/strik?utm_term=samsung+s5+mini+daten+sichern', appears to be a phishing or malware distribution lure. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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 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://xezojetit.ru/strik?utm_term=samsung+s5+mini+daten+sichern PDF link annotation
    • http://nowefewafugaki.iblogger.org/bloqueo_av_tercer_grado.pdfIn PDF document text
    • http://wejowadizabudex.mypressonline.com/65673325746.pdfIn PDF document text
    • http://jokegave.mywebcommunity.org/bellingcat_mh17.pdfIn PDF document text
    • http://bekotuselol.22web.org/cristianismo_e_liberalismo.pdfIn PDF document text
    • http://finipupote.mywebcommunity.org/how_to_get_rid_of_a_cystic_pimple_before_it_surfaces.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kokutefuto.epizy.com/zinc_plating_process.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/biodiversity_in_india_project.pdfIn PDF document text
    • http://woxepakaj.epizy.com/oxo_good_grips_manual_can_opener.pdfIn PDF document text
    • http://fabupumow.epizy.com/live_tv_apk_for_android_2._3.pdfIn PDF document text
    • https://4d3f6715-1114-433d-a4b7-45a5e22e3858.filesusr.com/ugd/ce86b4_fb3ebf0b65e84c639e9c9c14fb85554a.pdf?index=trueIn PDF document text
    • http://lipabarud.atwebpages.com/easy_crochet_baby_afghan_patterns_for_beginners.pdfIn PDF document text
    • http://mesesoriran.epizy.com/povatositazobapad.pdfIn PDF document text
    • https://c480cc3d-c044-45b7-a7fa-747782367dcd.filesusr.com/ugd/a26f59_d1fa5bba1d8942cb84364a738c23dd65.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/facilities_maintenance_management_plan_template.pdfIn PDF document text
    • https://d321836a-1bf8-47c4-b4d3-67fe1e7f0250.filesusr.com/ugd/33ab24_a761e9b92eff4ae8a53e6618112b1da5.pdf?index=trueIn PDF document text
    • http://sukasorepej.rf.gd/linux_command_line_converter.pdfIn PDF document text
    • https://92923600-264c-4cb8-9d87-181083d4f0d6.filesusr.com/ugd/0bf43f_7e41e2456e7240e7bec424de1479f561.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/135692567.pdfIn PDF document text
    • http://fizaronaxur.epizy.com/ccie_data_center_v2._1_workbook.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/1000_basic_english_vocabulary.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/molar_mass_of_co2_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/practical_electrical_wiring_book.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/xujidejizu.pdfIn PDF document text
    • https://75ca6b5e-a470-4e0e-8004-b00a9f1721b4.filesusr.com/ugd/1e4819_9dc1965763b34a3ea848fa3deb8d2fb4.pdf?index=trueIn PDF document text
    • http://dujupopo.epizy.com/guxeligoxuvofomewigaz.pdfIn PDF document text
    • http://giratas.epizy.com/coefficient_of_performance_of_heat_engine.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_off0000fe6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6E 5548 bytes
SHA-256: 027bc9d18cda750ace7f242820f0e095f5a9fd33ad5bbdd2d3c42d778b060725
font_01_sfnt_off0001111e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111E 11276 bytes
SHA-256: 1709b7b1132238e1ce436851850c444308efec41b35f1a628c715ccf532a5508

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