Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb34ef71b509232f…

MALICIOUS

PDF

82.1 KB Created: 2021-03-14 08:30:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 431a4e2084ac8cd80ce43e1179c0294e SHA-1: d20b865d91e708ad0e7f8657ea96d9412d9751c4 SHA-256: cb34ef71b509232f0d4362153b384c98fc55ba3b0e1b09b3a10570917228a1a2
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://golowaki.ru/123?utm_term=colorectal+screening+guidelines+canada', which is likely part of a phishing or redirection scheme. The document body, though heavily obfuscated, suggests a lure related to 'Colorectal screening guidelines canada'. No scripts were extracted, but the presence of an external URI in a malicious PDF strongly suggests it's designed to lead the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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
  • 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://golowaki.ru/123?utm_term=colorectal+screening+guidelines+canada PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4443337/normal_6021ffb558972.pdfIn PDF document text
    • http://tazizinujumijoj.mywebcommunity.org/61712978975.pdfIn PDF document text
    • http://ladunosim.sportsontheweb.net/ssg_by_laws.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467285/normal_603c196458697.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481825/normal_5fc60fc140d8b.pdfIn PDF document text
    • http://tometifo.getenjoyment.net/how_to_apply_for_covid-19_unemployment_benefits_600.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454822/normal_6011a23bb8a38.pdfIn PDF document text
    • http://fuxutigox.mypressonline.com/map_of_australian_states.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/jutenojamega/dashboard_template_angular_8.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/mazubegidofogofokamosi.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/extension_chrome_android_adblock.pdfIn PDF document text
    • http://pikididubemet.epizy.com/apollo_clinic_medical_reports_online.pdfIn PDF document text
    • http://xitivorigafu.epizy.com/brinkmann_smoken_grill_electric_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/fidiviwuvunolikizej.pdfIn PDF document text
    • http://jomewuborova.rf.gd/what_is_the_timeline_of_a_project.pdfIn PDF document text
    • https://s3.amazonaws.com/nitirew/install_amazon_prime_app_on_android_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/turtle_beach_px4_pairing.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/11450724834.pdfIn PDF document text
    • http://dekuroveki.rf.gd/xamebaverifujotisepivelus.pdfIn PDF document text
    • http://metotosebofetu.epizy.com/90105157400.pdfIn PDF document text
    • http://sijadogif.atwebpages.com/gastrointestinal_tract_ultrasound.pdfIn PDF document text
    • http://soxowanukaf.epizy.com/30967365646.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/loctite_243_50ml_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/dell_2001fp_service_manual.pdfIn PDF document text
    • http://pupuwejerew.epizy.com/are_prisons_obsolete_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/traditional_assessment_vs_authentic_assessment.pdfIn PDF document text
    • http://vebaxabono.epizy.com/16918128587.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_off0000f68c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68C 5012 bytes
SHA-256: 89eb2f6bcd3ef645bcc93f50a468c858fe7391904c77abe645386bb741372181
font_01_sfnt_off00010797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10797 10776 bytes
SHA-256: 22b04aba8cb984d280d86a869409c8fec44f5d1a8c75ecd3a55ab6fd3dc4d745
font_02_sfnt_off00012c64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C64 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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