Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb9a3c9452920eef…

MALICIOUS

PDF

76.0 KB Created: 2021-03-19 04:55:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: a717ff8847f2fc82447712f5a458896d SHA-1: f101c35ce991a3e28ddfbf0b00c99a4e075a7c9e SHA-256: cb9a3c9452920eef3924c3e25b168f517aae2cc81283c1f6917b1a3058a1a6ea
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a link farm or redirection scheme. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' strongly suggest malicious intent, likely for phishing or distributing further malware. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/wix?keyword=csta+2020+conference+schedule PDF link annotation
    • http://birjand.design/519826982087rogz.pdfIn PDF document text
    • http://tiktokhd.design/moultrie_trail_cam_walmart2uviu.pdfIn PDF document text
    • http://familyit.pro/88655742061z5162.pdfIn PDF document text
    • http://makamar.tech/pajalonb1kyq.pdfIn PDF document text
    • http://bestunew.xyz/cen_tech_battery_charger_manual_60322q278t.pdfIn PDF document text
    • http://gmetry.online/star_trek_pinball_machine_valuejoivz.pdfIn PDF document text
    • http://tersq.space/15527818952gjixx.pdfIn PDF document text
    • http://precabinets.xyz/what_is_a_pre-_sentencing_report_hearingau3yh.pdfIn PDF document text
    • http://kupivse.xyz/modern_political_thought_wootton689aq.pdfIn PDF document text
    • http://shopeuro.pro/zeny_cut_50_plasma_cutter_manualb9vmc.pdfIn PDF document text
    • http://pevetune.66ghz.com/financial_ledger_template_excel.pdfIn PDF document text
    • http://roflan.site/konosuba_light_novel_volume_1pb9hk.pdfIn PDF document text
    • http://sellamorem.com/nipixuj68h.pdfIn PDF document text
    • http://letnesil.xyz/kakugobaludasebesojadiki0kjgh.pdfIn PDF document text
    • http://keto-s1.com/wuberosivovaw5zj8j.pdfIn PDF document text
    • http://xufukutuvunimif.22web.org/firefox_51._0_1_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vulikoviluxugu.rf.gd/58885874895.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/classification_of_chemical_reactions_worksheet_page_60.pdfIn PDF document text
    • http://kofodubelo.rf.gd/laptop_motherboard_repair_cost_india.pdfIn PDF document text
    • http://wafibajew.epizy.com/al_baqarah_abdullah_al_matrood.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/41211801436.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/rudajirowopajununefe.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_off0000eb31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB31 5288 bytes
SHA-256: 0bd18d08ee302523e72be8346ebabd035cf193b55fb41689d75c652c5d26d368
font_01_sfnt_off0000fd1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1F 11228 bytes
SHA-256: 9ced2bce69db4a610872b819481f32dcad38327adff79131570851e62460f5d6

Open this report in the interactive analyzer, or submit your own file for analysis.