Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee64591f2d17625d…

MALICIOUS

PDF

74.0 KB Created: 2021-05-21 05:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 68a4ab3a1ae1bdcd8d77c96bee245308 SHA-1: e8b5312bc08f39a72e42ddf9f5bd4839b7c52710 SHA-256: ee64591f2d17625df375099d19b866588e576d9ebcaa3070c3126310dadc3747
96 Risk Score

Malware Insights

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

The PDF file contains a lure related to handwriting practice, which directs the user to an external URL. This URL, 'https://kuzutuzo.ru/strik?utm_term=ascenders+and+descenders+handwriting+practise', is flagged as suspicious and likely leads to a phishing or malware download site. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing attack delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/strik?utm_term=ascenders+and+descenders+handwriting+practise PDF link annotation
    • https://pozetegafikule.weebly.com/uploads/1/3/4/8/134857311/8482748.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402718/normal_605466bb91191.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496602/normal_6061f4f8dd56e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426944/normal_60331e9e2cc94.pdfIn PDF document text
    • https://jiburivaduvu.weebly.com/uploads/1/3/4/4/134473865/gesosipedogipux.pdfIn PDF document text
    • https://tutupofu.weebly.com/uploads/1/3/0/9/130968911/624682.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407301/normal_6001bc747ece4.pdfIn PDF document text
    • https://kitipodowenin.weebly.com/uploads/1/3/5/3/135383326/8874296.pdfIn PDF document text
    • https://rijumiwotoresu.weebly.com/uploads/1/3/4/4/134490354/bisonujasemo-lulikabapubof-depamasusukev-roluseruvatup.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/tunenijexe/can_outlook_calendar_sync_with_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/pepiwenivujukilizerokino.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/1248950533.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a77c89ba-9183-4234-b038-47e0456b6f05/royal_paper_shredder_not_shredding.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a591ca8-d094-42de-8e37-2c673800f740/ap_human_geography_terms_and_definition_of_imperialism.pdfIn PDF document text
    • https://s3.amazonaws.com/dazemi/jisutozakejulo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8de1d9a7-032c-4250-8d11-109512e3db46/list_the_three_estates_of_the_old_regime_and_explain_the_roles_and_responsibilities_of_each_estate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df377933-8ff2-4a73-92d4-baea6fc2c929/87597201883.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_off0000e5f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F6 5384 bytes
SHA-256: ca17e33909e8f9081e38f445236e9714b51f5258989a6236213674e9a8952b3c
font_01_sfnt_off0000f855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF855 10196 bytes
SHA-256: 893ec1707fee8d216351e85799eca7f7acc4782811b9e925cbb8a698f93604b5

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