Malicious PDF — malware analysis report

Static analysis result for SHA-256 a938cfa79a27acf7…

MALICIOUS

PDF

81.9 KB Created: 2021-03-17 06:23:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: dccb22c9ffed29b5d8e46e1f81cb789c SHA-1: ea46244290366557d16369ed22dbbd54e0a2870a SHA-256: a938cfa79a27acf7256887e8d3cbbd38e7c46335349a6587ee04c45bd68da6b6
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a suspicious domain, likely intended to trick the user into downloading further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to exploit user curiosity or trust by mimicking search results.

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://golowaki.ru/award?keyword=eduardo+galeano+pdf PDF link annotation
    • http://kufukoxeb.22web.org/xotik.pdfIn PDF document text
    • http://xagevogewa.medianewsonline.com/ancient_history_notes_for_ssc_cgl.pdfIn PDF document text
    • https://cdn.sqhk.co/vimerokil/ichfGgi/zajeduvenevosaka.pdfIn PDF document text
    • https://cdn.sqhk.co/rumunefa/cSGcQwV/vareliwawofasefuguluw.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/tuxalowafokuvo/ccris_report_update_date.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/susobaxogotoxaf.pdfIn PDF document text
    • http://xovolefewawex.atwebpages.com/17397519900.pdfIn PDF document text
    • https://s3.amazonaws.com/sukobogixe/30326582843.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/beginner_piano_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/xawamozal.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/corded_home_phone_with_answering_machine.pdfIn PDF document text
    • http://xovijoj.epizy.com/zebomilav.pdfIn PDF document text
    • http://pokukalaso.rf.gd/95995651800.pdfIn PDF document text
    • https://s3.amazonaws.com/rivazixexuguri/jammu_university_ug_date_sheet_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/vexeliku/paypal_logo_usage_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/xekidaxeb.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/baby_bjorn_cradle_mattress_protector.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_off00010545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10545 4988 bytes
SHA-256: e062f11ac80f5605d0488a009c106f527bc845265d31efe88cb3d71df73d81f8
font_01_sfnt_off00011652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11652 11080 bytes
SHA-256: a5a50367080fe0a07505e5c71c2e1c337838d0d4033651824f743af64af7f24c

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