Malicious PDF — malware analysis report

Static analysis result for SHA-256 2089c672c5cb328d…

MALICIOUS

PDF

79.0 KB Created: 2021-01-30 12:51:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 723212b47140a6d9f150f9ca0b728220 SHA-1: 041e373c983547e45715eb0dc21d7a45fb6415b3 SHA-256: 2089c672c5cb328df32e15ecec717581c396fd2202d8be7736095f6f46ae1dea
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The document body appears to be malformed or obfuscated, but the presence of the external URI and the malware detection strongly suggest a phishing or credential harvesting attempt.

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://druttle.ru/123?utm_term=lluvia+acida+que+es PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421781/normal_60017bba48d9f.pdfIn PDF document text
    • https://gofadoden.weebly.com/uploads/1/3/4/6/134615513/f5b93c54.pdfIn PDF document text
    • https://cdn.sqhk.co/womawuxinuge/ejeQ4jj/40564320203.pdfIn PDF document text
    • https://cdn.sqhk.co/nalogigoke/DhhihaF/jamupina.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisimak/jieia6R/easy_payday_loans_no_credit_check.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455670/normal_6008a37de28cb.pdfIn PDF document text
    • http://muruxilirafet.iblogger.org/reporting_allegations_of_regulatory_misconduct.pdfIn PDF document text
    • https://fusajebotiv.weebly.com/uploads/1/3/4/3/134320253/dataso-rubemakitixoki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448124/normal_5ffba1561d18b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391013/normal_5ffcff1a6cdf7.pdfIn PDF document text
    • http://xewixejixukumes.22web.org/school_things_fun_worksheets.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nozumipoz.epizy.com/mesiridudokopadowef.pdfIn PDF document text
    • http://bidetorula.rf.gd/road_race_bike_game_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/bartley_green_school_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/indian_drawing_art_forms.pdfIn PDF document text
    • http://ziboporo.epizy.com/puteredititonivukivaduku.pdfIn PDF document text
    • https://s3.amazonaws.com/pukiza/16832399198.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/arduino_cnc_controller_software.pdfIn PDF document text
    • https://s3.amazonaws.com/jigezilor/vonodeti.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_off0000f8d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D6 4964 bytes
SHA-256: 0c12ff28f0412400af4cca366f04735e9f9bb6ab0cc3712d1802e61b7b91dcb4
font_01_sfnt_off000109ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CE 11088 bytes
SHA-256: 2a7c13a7055d28c8112573042e1d6eedd3e26fd7e430b631e5abdd93ba0e6a16

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