Malicious PDF — malware analysis report

Static analysis result for SHA-256 a12b1e97daa468e2…

MALICIOUS

PDF

72.2 KB Created: 2021-02-27 21:58:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 29052bebb980c12c6b07261c3de571fb SHA-1: 6211936650b4db833539ebd4d8cd01719db0bb5f SHA-256: a12b1e97daa468e2deee5ab07a74ca04f93b7deda071acf2d4f1a409cb0d4639
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it uses a social-engineering lure to trick users into installing a browser extension or update. The embedded URL `https://ponafet.ru/aws?utm_term=google+maps+street+view+march+2020` likely serves as a redirect to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/aws?utm_term=google+maps+street+view+march+2020 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4377902/normal_5ffda1cbbbb80.pdfIn PDF document text
    • http://redefotifakafaj.22web.org/66056856876.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492593/normal_6008d6ffe455c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375206/normal_5ffc956f8daa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477156/normal_601f897ac890c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373304/normal_5fd9a1a861bb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405409/normal_602d6a24c5205.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/faduxodiwo/best_to_word_converter_zamzar.pdfIn PDF document text
    • http://xusoloturokuk.epizy.com/15244458597.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/vehicle_branding_mockup_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/75028806215.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/16548634242.pdfIn PDF document text
    • http://zugotival.epizy.com/usda_report_9-_12-_19.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/ielts_general_reading_practice_papers_with_answers.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_off0000dcb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB0 5804 bytes
SHA-256: af9578e54935c50393f8820de780fd0952a1d408ff626312c20366cfd88981ce
font_01_sfnt_off0000f05f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05F 10424 bytes
SHA-256: 8217a74ec1f7f389737ad3e30fe7c0310bed0f3797cc8a52ea408606529c8e5a

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