Malicious PDF — malware analysis report

Static analysis result for SHA-256 c53ce4bef92eef17…

MALICIOUS

PDF

81.8 KB Created: 2021-03-18 05:57:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 24b5b25d59877af4e76db7047dc33e8b SHA-1: eb2459d95bb58ab05c0bb0736d8bde60329f5ba5 SHA-256: c53ce4bef92eef171453c7ba1e40c5de8c922543a03216b025a5e45f409d9a24
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an external URI pointing to a suspicious domain, likely intended for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to trick the user into accessing malicious content.

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://dugedepap.ru/strik?utm_term=ivan+galamian+scale+system+violin+pdf PDF link annotation
    • http://ziwavabewite.66ghz.com/xatufirefuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457854/normal_5fd5fa47aaaa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467325/normal_602211623dced.pdfIn PDF document text
    • http://serikanipesemo.iblogger.org/94552892685.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463010/normal_5fcdcc41cfd34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404965/normal_6044683363524.pdfIn PDF document text
    • http://xiwewad.iblogger.org/pakeso.pdfIn PDF document text
    • http://mopasiwamosul.iblogger.org/who_is_eligible_for_minister_housing_allowance.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/tuxexi/planet_earth_coloring_template.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/viranosekusivuvoramemesu.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/dusuzan.pdfIn PDF document text
    • http://tuxavilewik.rf.gd/celebrating_diversity_through_world_literature.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d072e4c5-93e7-4f7b-9dcc-333d185c81b6/54135396511.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/69803058268.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4716ebc-6378-4ce0-9523-051c4bfeba2e/how_often_do_penny_stocks_make_it.pdfIn PDF document text
    • http://bivofigelekira.epizy.com/vusorid.pdfIn PDF document text
    • http://notavopanugatog.epizy.com/geremoligiros.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/38469810022.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7ee0527-d2ca-44fa-ba8a-e772727e470c/gm_diet_success_stories.pdfIn PDF document text
    • http://sozofini.epizy.com/zipevaxafagogog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd92fdba-6d7c-46d2-88e8-81f11cf25485/interior_angles_of_regular_polygons_formula.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/50751042724.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_off0001006a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006A 5476 bytes
SHA-256: e51646ea334370060dc8051cc6219d66e01cde168e56563bc06c3d60942acb8c
font_01_sfnt_off00011317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11317 11528 bytes
SHA-256: 15434455faee91d04e592ec4d72ae20c79f0e410e930ec8786ef5d5bf5cbd011

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