Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc40fa5c851bb9b5…

MALICIOUS

PDF

76.1 KB Created: 2021-03-15 18:27:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b5f709aa5383b2e061b6a2cf66a5a102 SHA-1: c6a6813e2e7bb0f430f57b0e3c567ca33f6dc465 SHA-256: dc40fa5c851bb9b57c7326e5f94075831a320ea70813c2fc24071821dda5554a
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a fake browser/software-install lure. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://pelibifir.ru/award?keyword=restaurant+billing+system+project+report+pdf PDF link annotation
    • https://cdn.sqhk.co/dufelogaruf/ibhhhcx/hollywood_reporter_film_schools.pdfIn PDF document text
    • http://world-wild-shop.com/windows_10_upgrade_assistant_latest_versionrvf0n.pdfIn PDF document text
    • https://cdn.sqhk.co/zopizote/jrdcFzh/fuvobum.pdfIn PDF document text
    • http://tajavupirewu.22web.org/how_do_you_fix_a_seized_riding_lawn_mower_engine.pdfIn PDF document text
    • http://jopkapopka.online/nisipxu7nq.pdfIn PDF document text
    • https://cdn.sqhk.co/reparepoki/zAxhbbo/call_of_duty_mobile_download_ios_ipa.pdfIn PDF document text
    • http://pressit.fun/25703401886xo5yc.pdfIn PDF document text
    • http://fartook.online/hmmsim_2_train_simulator_download_revdlsy48g.pdfIn PDF document text
    • http://damvglaz2.xyz/zokivetisamuwhq3w.pdfIn PDF document text
    • http://vclean-sale.shop/zipetevulaxlvwof.pdfIn PDF document text
    • http://creamwalls.space/mewatamaleduwo2orwh.pdfIn PDF document text
    • https://cdn.sqhk.co/denalivek/ijW2Hhf/fallout_new_vegas_hack_terminal_console_command.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/jijari/cryptogenic_stroke_guidelines.pdfIn PDF document text
    • http://tiwojojerat.rf.gd/libro_la_botica_de_la_abuela_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/viposogajapux.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/avery_label_template_5267_dimensions.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/ranikonunusuxanego.pdfIn PDF document text
    • http://pikexiwa.epizy.com/diamond_buying_guide.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_off0000ea62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA62 5800 bytes
SHA-256: f05f576942064c5888eaa97fedf3a30f0c94cd291aac27dc155d70c39aee20c8
font_01_sfnt_off0000fe1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1F 10884 bytes
SHA-256: 5ca57959fe705c701410ca1cb148ba8d40b69c4762b6c2e1eaac65a5518f2dcb

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