Malicious PDF — malware analysis report

Static analysis result for SHA-256 595cb32110314636…

MALICIOUS

PDF

106.8 KB Created: 2021-04-24 14:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 90278d0fabd7c09fe99f13432bb9a1ff SHA-1: b2315f03041c890f63e64ade16d5e5254a63d66a SHA-256: 595cb32110314636f9b6223314177a7b84be7a9947aa592e6a620cad2c293f14
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that directs the user to a suspicious URL, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to exploit user curiosity and lead them to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=what+extra+books+are+in+the+catholic+bible PDF link annotation
    • http://milktree.store/rufikurelisoju1tqb2.pdfIn PDF document text
    • http://idealslim-italiaoficial.site/bosexelul9il3e.pdfIn PDF document text
    • http://ijmalan.xyz/agoraphobia_dsm_5_criteria5a3bq.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/nuxomigo/implied_metaphor_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/free_ancient_civilizations_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/remstar_pro_c_flex_pressure_adjustment.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/european_union_cv_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/wimege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f7e57fa-eff2-4d2f-b37e-0ec328291ba1/63825692540.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/wazonipizugudupurojifed.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/bewomipakowizax.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/21818753018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abeb070f-a31a-4106-9305-f2ef25df383d/patusixofakoki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a6aeffa-ec14-4e74-ae0f-a4df300e0a91/pikesafe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53cb9006-8690-42e3-a9bb-d66d6470ca52/how_to_day_trade_crypto_for_a_living.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/9283918174.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccb50f50-406e-4858-aad7-28c1a8c7fd25/nelomuruxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1a4a014-05c0-49ed-a0e2-79911d1a2452/kasowixupurogib.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/toefl_reading_practice_test_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/50376373332.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9e96a04-2fda-4006-844b-8c6628d7ce32/google_maps_3d_street_view_online_pakistan_lahore.pdfIn PDF document text
    • https://s3.amazonaws.com/xuvamuba/zane_books_free_online.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_off00015fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FD9 5172 bytes
SHA-256: f239cd558fb32f8a356ca275c3062e72884daa695927a18f34c7efa5b7567777
font_01_sfnt_off0001717a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1717A 13572 bytes
SHA-256: b7a8e1066ff0d1fd708fac6a58e534630d9d6778116250706bc0febb2be3f1d1