Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20c0abc40734c25…

MALICIOUS

PDF

77.0 KB Created: 2021-04-20 01:34:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f4f578f9ed1687f3014d8bf911d1defd SHA-1: 48f72f190207945cac2e2afabff1b0e54cd454d2 SHA-256: e20c0abc40734c2594ac9f73ad6369efbb401607ca327d3c645e9510f26ce98b
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://maypoin.ru/strik?utm_term=hp+elitebook+6930p+price+in+nigeria PDF link annotation
    • https://sigogaxeba.weebly.com/uploads/1/3/4/6/134620414/nevogido.pdfIn PDF document text
    • https://cdn.sqhk.co/tivanosox/he4FggM/used_cars_for_sale_by_owner_under_10000.pdfIn PDF document text
    • https://cdn.sqhk.co/nixivezez/jgeyGuJ/24575609647.pdfIn PDF document text
    • https://cdn.sqhk.co/dasekizob/fwZjduu/download_last_day_zombie_survival_mod_apk_terbaru.pdfIn PDF document text
    • http://metinozub.iblogger.org/contact_information_template.pdfIn PDF document text
    • https://warororob.weebly.com/uploads/1/3/5/3/135314520/xorazilefex.pdfIn PDF document text
    • http://pexiwaz.iblogger.org/bugetonazofufabobekevat.pdfIn PDF document text
    • https://cdn.sqhk.co/guwewaxa/bWniaxz/59326318525.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/mefovu/computer_all_parts_name_list.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/atheros_ar5b125_driver_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/format_factory_for_android_mobile_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/rirupi.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/python_the_complete_reference_latest_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/brave_explorers_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/rogesalekubekato.pdfIn PDF document text
    • http://sefenepisepaje.rf.gd/15080122693.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/19709281181.pdfIn PDF document text
    • http://kezosofudan.rf.gd/autobus_marbella_malaga_aeropuerto.pdfIn PDF document text
    • http://jupafikita.rf.gd/xizagabazi.pdfIn PDF document text
    • http://vurorevebosexu.rf.gd/megitozegowepijerawoma.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/fertilizers_and_chemicals_travancore_limited_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/do_gas_hvac_have_pilot_lights.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_off0000eb68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB68 5704 bytes
SHA-256: cef35b4d6f36892116346d15491349cad6b4f9eef99f1ebb526a5c70d3760697
font_01_sfnt_off0000fed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED4 11300 bytes
SHA-256: b7c6df23118a11dff961db8435d56c9826b08d239e5ca07f7fd85a7d7bb998e0

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