Malicious PDF — malware analysis report

Static analysis result for SHA-256 da33d46f3f336193…

MALICIOUS

PDF

120.5 KB Created: 2021-02-21 21:04:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: f3a91ef9e6a3aaeda3a497cfdb31506c SHA-1: f09d7edefbd56b78b02935b048e3df68658c8f38 SHA-256: da33d46f3f336193749a251eedd0c015c5ec14915c7ed508bd6e916c98842958
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URL heuristics point towards a malicious document designed to exploit user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/aws?utm_term=is+the+handmaid%2527s+tale+book+appropriate In PDF document text
    • http://sakhavto.ru/android_phone_rooted_now_whatcuc2i.pdfIn PDF document text
    • http://jotewelife.iblogger.org/guided_imagery_scripts_for_depression.pdfIn PDF document text
    • http://apelsins.space/milolibipunibifuveve8u3xp.pdfIn PDF document text
    • http://rilotelexewobos.iblogger.org/meniwejolosusakeb.pdfIn PDF document text
    • http://werisafijorarit.iblogger.org/english_grammar_in_urdu.pdfIn PDF document text
    • http://bilapak.66ghz.com/15984102972.pdfIn PDF document text
    • http://aicberg.net/le_futur_simple_exercices_corrigslzvi7.pdfIn PDF document text
    • http://detonic-ufficiale.website/tangled_cartoon_full_movie_freeywvvp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/minegikukovel/call_of_duty_4_modern_warfare_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/adobe_photoshop_lightroom_3._3_selective_apk.pdfIn PDF document text
    • http://vafukibugaf.epizy.com/what_does_it_mean_if_it_hurts_when_you_look_up.pdfIn PDF document text
    • https://s3.amazonaws.com/salade/viral_myocarditis_treatment_guidelines.pdfIn PDF document text
    • http://ledudixip.epizy.com/gentleman_in_moscow_reading_guide.pdfIn PDF document text
    • http://rozopujonabesix.epizy.com/196905513.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/formal_email_greetings_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/modern_chronological_resume_template.pdfIn PDF document text
    • http://deweget.rf.gd/17156050952.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/excel_vba_for_array.pdfIn PDF document text
    • http://livukuxuperum.epizy.com/floating_wind_turbine_seminar_report.pdfIn PDF document text
    • http://fuwotatikiluwa.epizy.com/upsc_cadre_allocation_2016.pdfIn PDF document text
    • http://suzoduw.rf.gd/herramientas_de_busqueda_avanzada_informatica.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_off00018a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A98 5160 bytes
SHA-256: a99f1edb6774084d922b0390306b899518ecb9cec3a5ae3c58b0fbe79ba3bcab
font_01_sfnt_off00019bde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19BDE 12480 bytes
SHA-256: d676d87cfd698f7a46f14859902fb6e3c744504c079d438378352f255be58804
font_02_sfnt_off0001c59a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C59A 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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