Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fa55045cdcbede9…

MALICIOUS

PDF

83.0 KB Created: 2021-03-04 03:06:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 35968311eb771550b8f1468bfbb9d773 SHA-1: 055b9d92d82be8fa1b7cd4b97d26c5bff642b860 SHA-256: 7fa55045cdcbede9fc66b2ac848c6b1c463898fd71fe58c198a05231c5d707db
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that appears to be part of a phishing lure, disguised as a search result for educational materials. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a potentially harmful website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/award?keyword=conflict+resolution+worksheets+for+middle+school+pdf PDF link annotation
    • http://barcaporirternet-interbank-pe.com/baixar_aplicativo_uberk6p9k.pdfIn PDF document text
    • http://mx50off.pro/car_race_games_for_androidff30b.pdfIn PDF document text
    • http://vevufilusik.scienceontheweb.net/ginujovuturilaxafaz.pdfIn PDF document text
    • http://help-bluebadgecenter.com/batch_convert_html_files_tou7g1u.pdfIn PDF document text
    • http://dofujifeluradep.medianewsonline.com/83705742705.pdfIn PDF document text
    • https://cdn.sqhk.co/jumibizede/fhj6jcR/23745547949.pdfIn PDF document text
    • https://cdn.sqhk.co/subetudagoli/gJwDggF/18576356074.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/dojonuta/66335383972.pdfIn PDF document text
    • http://rixigor.onlinewebshop.net/black_and_decker_grass_hog_weed_eater_battery.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/pelune.pdfIn PDF document text
    • http://tulajadulixo.myartsonline.com/integral_cos_x_ex_dx.pdfIn PDF document text
    • http://vutevesofu.rf.gd/whatsapp_karna_hai_kaise_kare_batao.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/38119667064.pdfIn PDF document text
    • https://s3.amazonaws.com/kegovev/1727571861.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/60430272468.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_off0001099d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099D 5248 bytes
SHA-256: 0c9b3a5df51884c01fc101982c96cfaea74dea617852bf14457601526971f0b3
font_01_sfnt_off00011b62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B62 10196 bytes
SHA-256: e7b20f8811704257a4f6569690e33bc01dcfa99952445f32181c457f99e2bd61

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