Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb14592f7675bd4b…

MALICIOUS

PDF

82.7 KB Created: 2021-01-06 14:22:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 57151781cd1500c6882966dcf38e339a SHA-1: faa7071d0189285820b7d349aba1bc26baea856b SHA-256: eb14592f7675bd4b6dc610e4ac6d8c40c508a805d959a9f2aafd249b8babf3d8
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are likely part of a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs suggest an attempt to redirect the user to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafftec.ru/aws?utm_term=android+developer+bluetooth+headset PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421781/normal_5fad67aee6a8e.pdfIn PDF document text
    • https://cdn.sqhk.co/ginijetemepa/dCjijd7/728_horizon_drive_grand_junction_colorado_81506.pdfIn PDF document text
    • https://vanopatabef.weebly.com/uploads/1/3/1/4/131407067/79c8bd878de1ed7.pdfIn PDF document text
    • https://fidegobopoj.weebly.com/uploads/1/3/2/8/132815019/zunawi-zisapitexa-budamaxovosaxiz.pdfIn PDF document text
    • https://cdn.sqhk.co/pajerelo/aiaHPKx/wireless_driver_download_for_windows_7_32_bit.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/87313b0f4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368495/normal_5fd8e837b414c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/080cd908-ef41-4d4b-bd50-a2fa4252d3f7/pa_election_ballot_2020_candidates.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/81205931910.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57bbce49-2fc9-433c-b06d-42b4b09c8390/40922072970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14ef298d-8efa-4812-8c0b-bd3ff4f44c84/jackie_robinson_biography_book.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/banshee_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cd755ae-25b1-4c44-a7cf-3bde64942ffc/ordinance_of_1785_quizlet.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_off00010402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10402 5236 bytes
SHA-256: 0d9c40b2297b4aa7c521ffa444b27144f786347b7cbeeda7ab11a2c6b01d2c91
font_01_sfnt_off000115c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C5 11804 bytes
SHA-256: 1ff546cd85c398ebf6c840984b816e4ca9de095e30d8b53c5f1aa4004cc4cbe3

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