Malicious PDF — malware analysis report

Static analysis result for SHA-256 64ac057cf46e03fe…

MALICIOUS

PDF

66.8 KB Created: 2021-01-08 14:03:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 64c8277bf9409646706c316c55f7b398 SHA-1: bcc6eff58b9a7534840eeebe3c91ab8dc748aefe SHA-256: 64ac057cf46e03fe2192daf4a5d61ebcc9346136d9350e78da95b65fe1299a59
154 Risk Score

Malware Insights

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

The file is a PDF that contains a link to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing or malware delivery. The embedded URL is the primary indicator of compromise, likely serving as a lure to a malicious site.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ggtraff.ru/aws?utm_term=mapa+africa+mudo+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417206/normal_5fade27438545.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/UTjaZCF/cut_rope_2_apk_download.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/vizegemawokaxe/73329679814.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/pathophysiology_of_pulmonary_tuberculosis.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/wondershare_video_editor_full_version_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/que_es_la_ostomia.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/dobesugemavojixif.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/siliromuv.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/gothic_calligraphy_practice_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/72772691232.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/clep_chemistry_practice_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/word_processing_skills_job_application.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/buwivaburolukuganesu.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_off0000c5be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5BE 5096 bytes
SHA-256: 0352ba553e75bd342b2257783e2a790b04013e3ef8811d0ab0f5fe7596d450fc
font_01_sfnt_off0000d70f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD70F 12224 bytes
SHA-256: 372c93de0fb7d440b082fa7f643f7e2ecb106065a5cd602a1d15efcf67a49893

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