Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f7642baa16889c8…

MALICIOUS

PDF

78.4 KB Created: 2021-03-24 09:16:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 31435560b0e085945b54b8617aaac5e2 SHA-1: 21263a697095d65a5a6d5cd7b6b2be7936247ef6 SHA-256: 7f7642baa16889c81825b4534640f5d8882374dedbc1e886952dd24c992aacf4
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a URL that is likely part of a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external URIs suggests the document is designed to redirect users to malicious content, potentially for credential harvesting or further malware delivery.

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://kuzutuzo.ru/wix?keyword=instant+zest+rice+and+grain+cooker+reviews
    • http://lovemecompletely.com/juditelufafogewatojasjrpi3.pdf
    • http://nufivuzelikonax.getenjoyment.net/fidoluwetiborovo.pdf
    • http://tiktokhd.design/6303994611716rxu.pdf
    • https://static.s123-cdn-static.com/uploads/4408601/normal_5ff41089d828d.pdf
    • https://cdn.sqhk.co/tubadaluzafu/VggrXib/55515828125.pdf
    • https://cdn-cms.f-static.net/uploads/4375070/normal_6022917f6ab21.pdf
    • https://cdn.sqhk.co/solalokazili/siighwk/legend_of_sword_and_fairy_3_sub_indo.pdf
    • http://xebupado.mypressonline.com/sabupifap.pdf
    • http://freshka.fun/fugolesefixagamigufibifr9uyb.pdf
    • http://zomoxoxuriw.mypressonline.com/boogie_woogie_piano_for_dummies.pdf
    • https://cdn-cms.f-static.net/uploads/4412758/normal_6050adbcd8c2f.pdf
    • https://cdn-cms.f-static.net/uploads/4426971/normal_603a5ca464758.pdf
    • http://rowaxamapitowej.getenjoyment.net/order_of_adjectives_worksheets_for_grade_4.pdf
    • http://maykistore.ru/college_football_playoff_national_championship_2021retf9.pdf
    • https://cdn.sqhk.co/tiviluluje/iho1Dje/management_and_leadership_skills_test_most.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://6fd4412c-3e6e-4f21-a9af-8137ffc6c0d9.filesusr.com/ugd/03469c_4b0cf9395cf44cc38816e9ae745f663a.pdf?index=true
    • https://s3.amazonaws.com/natewared/13303655079.pdf
    • http://nejarisiwudu.atwebpages.com/conversations_with_god_movie_download.pdf
    • https://s3.amazonaws.com/gurowozenupifi/medialink_router_problem.pdf
    • https://s3.amazonaws.com/bifamomove/91527378731.pdf
    • https://770ad53b-b55e-4e58-b1eb-3709f41304f7.filesusr.com/ugd/98e298_d9c9b4a888d646cea3539bf8f5f423f0.pdf?index=true
    • https://s3.amazonaws.com/viboxikuz/vw_up_service_schedule_booklet.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2e7.bin
ab84fc15ed9e12a374df27da687ad69ea3c3a9d6a376346f1785913cd7a82c9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E7 5280 bytes
font_01_sfnt_off00010509.bin
7d6f24c05000019957d2ca257eaf67b39aa05b3d843678eefe974a7977b60431		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10509 11408 bytes

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