Malicious PDF — malware analysis report

Static analysis result for SHA-256 59b6dfa9cb0c1f5e…

MALICIOUS

PDF

119.0 KB Created: 2021-03-23 21:58:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 402e91e3c6788e0f626e68376a78a112 SHA-1: b1ee53a3d4bbca56b7cab8ca41d601edbe1047e2 SHA-256: 59b6dfa9cb0c1f5ec0476c336cc00e2e4ab82ab47926e71a0f07500db0426714
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to suspicious domains, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a link farm designed to host malicious content or redirect users. While no scripts were explicitly extracted, the nature of the embedded links and the ML classification point towards malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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://kuzutuzo.ru/strik?utm_term=what+are+the+15+logical+fallacies PDF link annotation
    • http://smartcreditscore.info/tadolanejixavatidodezizu6iqcd.pdfIn PDF document text
    • http://hookup154.site/wedding_veil_length_guidea3xxx.pdfIn PDF document text
    • http://money-team.site/javexefosububogezotilomif4h5js.pdfIn PDF document text
    • http://saxozumipelezip.22web.org/70058993154.pdfIn PDF document text
    • http://damvglaz1.xyz/is_a_masters_in_molecular_biology_worth_ita26tg.pdfIn PDF document text
    • http://bu-markett.com/what_is_national_autonomy_meanings6j6r.pdfIn PDF document text
    • http://tivulaxovena.22web.org/palabras_agudas_llanas_esdrjulas_y_sobreesdrjulas_ejemplos.pdfIn PDF document text
    • http://helpcopyright-service.com/xejiwpknbb.pdfIn PDF document text
    • http://reduslim-ufficialesito.site/digujudidabomevir3407f.pdfIn PDF document text
    • http://vvinorama.website/bitililerokelujmjgly.pdfIn PDF document text
    • http://free-at.pro/634052173525k0ri.pdfIn PDF document text
    • http://chunyoo.com/willingness_letter_format_to_continue_the_jobnrs1z.pdfIn PDF document text
    • http://oneitstore.info/8412305048713zzr.pdfIn PDF document text
    • http://sandwichhq.club/piveworihx4.pdfIn PDF document text
    • http://fuckfrsky.com/sensory_words_worksheet_kindergarten9dsf6.pdfIn PDF document text
    • http://tulakijumipad.22web.org/20159283619.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/tulosa/mivida_master_plan.pdfIn PDF document text
    • http://solejow.myartsonline.com/86648241546.pdfIn PDF document text
    • http://ralixafuligo.rf.gd/35946240923.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/english_grammar_worksheet_for_class_2_cbse.pdfIn PDF document text
    • http://zisufabelez.epizy.com/49213209676.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/english_dictionary_offline_for_pc.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/honeywell_smart_thermostat_not_working.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017eda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EDA 5332 bytes
SHA-256: 8e5a961cb5e5eda98632a24ba467a05d06eae4c4ed73b3d97c2f3b59269409f5
font_01_sfnt_off00019115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19115 11892 bytes
SHA-256: 7b8acfdec1cab672212bb3b1728e51c37a60812df142ae17c02fa6ed50db659b
font_02_sfnt_off0001b90e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B90E 16076 bytes
SHA-256: a0852c4690a6c7c4be107c8faaea32186891696821b3a96aec1037a99786b2f1

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