Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1863ee43276e554…

MALICIOUS

PDF

67.2 KB Created: 2021-02-10 03:26:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 72ce2b5b51079dacd203444263588d9e SHA-1: 0df076171e5c704b608852c9ff2e8ad46218d13f SHA-256: b1863ee43276e554c8f918bd384432ffdb6d226e3004c8e0621fd5b17f8b4edf
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains an embedded URL pointing to 'https://jacksth.ru/123?utm_term=livingston+academy+naples', which is likely a phishing lure. The ClamAV detection name 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' further supports the phishing and trojan classification. The document body, though heavily obfuscated, contains metadata related to 'Livingston academy naples' and 'wkhtmltopdf', suggesting a targeted phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/123?utm_term=livingston+academy+naples PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4443617/normal_5fcdfb7cc114a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407998/normal_5fea0694783bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370284/normal_5ff6ad0771588.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408989/normal_600a6eb06cfad.pdfIn PDF document text
    • http://sikutamilom.iblogger.org/37350074466.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dokubuxopid.rf.gd/kawozofifemisazotafas.pdfIn PDF document text
    • http://xiditad.rf.gd/sokka_thangam_songs_kuttywap.pdfIn PDF document text
    • http://wewadem.epizy.com/aplikasi_chromatic_guitar_tuner.pdfIn PDF document text
    • http://bitugoxopezuwu.rf.gd/pupufesilerisav.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/circuit_training_function_notation_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/jamia_millia_islamia_anti_ragging_affidavit.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/cbse_2018_exam_date_sheet.pdfIn PDF document text
    • http://tagugatukosag.epizy.com/free_portfolio_website_templates_for_web_developer.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/auxin_adventitious_root_formation.pdfIn PDF document text
    • http://poxemibusap.epizy.com/photo_slideshow_animation_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/hsslive_physics_half_yearly_answer_key_2018.pdfIn PDF document text
    • http://xatosizukav.epizy.com/accident_enquiry_report_format.pdfIn PDF document text
    • http://fidotetunuxezi.epizy.com/apparel_website_design_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/xifotunakasovagajo.pdfIn PDF document text
    • http://supabusoto.rf.gd/mujofesi.pdfIn PDF document text
    • https://s3.amazonaws.com/kiguteperilodu/arduino_uno_starter_kit_projects.pdfIn PDF document text
    • http://tirevotijo.epizy.com/transformers_tra_mv5_voyager_autobot_hound.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_off0000ca48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA48 5400 bytes
SHA-256: 52518c5100bfe76a1cc51f510a16f32a9884b1ee667fc49ff630b655977451bb
font_01_sfnt_off0000dcb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB0 10284 bytes
SHA-256: c9b7ef362a2c3120490f3c379c431a9956f2869f639f5681dfa83d26dc832f4f

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