Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1ec11e9c5f6c2c4…

MALICIOUS

PDF

76.7 KB Created: 2021-02-27 15:41:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 48f565558ec39cb0cf78a0bec6b02e7b SHA-1: 198716ec5921f4fe821e27f27cd6c8ea49b7b7c0 SHA-256: c1ec11e9c5f6c2c4be8bd1db8e661462222be5a1814e89c4056f8398d9615590
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading further malware. ClamAV detection and ML classification strongly indicate malicious intent. The presence of multiple external URLs, some with unknown reputation, further supports a phishing or malware distribution attack pattern.

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://bologen.ru/123?utm_term=operating+systems+concepts+silberschatz PDF link annotation
    • https://cdn.sqhk.co/jufebarur/hjhAcie/wikaripobufobidujiko.pdfIn PDF document text
    • http://sesizuxewewax.mygamesonline.org/tumije.pdfIn PDF document text
    • http://naturalik.fun/17700098176nmo3b.pdfIn PDF document text
    • http://totalcreditcheck.info/on_the_road_again_grateful_dead_chordsaogtb.pdfIn PDF document text
    • http://fofiwafajelerax.sportsontheweb.net/28939538096.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/midaguvimabof/sample_meeting_agenda_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/finding_slope_from_linear_equation_worksheet.pdfIn PDF document text
    • http://werewipabelud.rf.gd/genetic_algorithm_book_by_goldberg.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/how_to_deactivate_first_alert_smoke_detector_model_p1210.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/6304894556.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/company_structure_chart_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/46689662658.pdfIn PDF document text
    • http://sulijugofogim.onlinewebshop.net/caracteristicas_de_los_personajes_del_libro_el_dador_de_recuerdos.pdfIn PDF document text
    • http://nosigegu.onlinewebshop.net/litotozo.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/a_line_maxi_skirt_formal.pdfIn PDF document text
    • http://i.imgur.com/4sftcoo.jpgIn 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_off0000ed3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3D 5668 bytes
SHA-256: 3265bd74347cf2376ed6ba05ccdc6ab77b626285468ac0ec43cccd9ed38fb208
font_01_sfnt_off00010060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10060 11056 bytes
SHA-256: 5b2375f672dbd39be146b5e27a6b2035fab3b46225f0f9c25a11f4b237d43c15

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