Malicious PDF — malware analysis report

Static analysis result for SHA-256 79c04f54c55b5fd7…

MALICIOUS

PDF

111.3 KB Created: 2020-11-23 12:33:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: f94d4fc9b3ddbc9fd5c16e751df87626 SHA-1: dbdaeae7aa6ddcb8e58f4a21a0c7055e5755696b SHA-256: 79c04f54c55b5fd7787570c57e25a3bb9fe1c858429fc87b5d730889b2934c85
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/aws?utm_term=cubensis+b+trip+report'. This indicates the document's primary purpose is to lure the user to this malicious site. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or malware distribution scheme.

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://cctraff.ru/aws?utm_term=cubensis+b+trip+report In PDF document text
    • https://cdn-cms.f-static.net/uploads/4463266/normal_5fab19f75655e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f870213132bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445866/normal_5fa920c758f0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417139/normal_5f97ddc5e1b41.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5f888229ad18c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413850/normal_5f9a604ec0942.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376371/normal_5fbb52f881bf0.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/a2133a54-4ede-4fb3-a3e8-c143735ab352/peveraxov.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/cashback_2006_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/adestramento_inteligente_2_edio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c585b17-f657-4f10-98ce-a788ae5795f2/dewey_decimal_system_games_online.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/lodapidomikugexumukojepa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa0b32e1-d3b6-4918-b01b-3cf05035d306/88976553655.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/automation_engineer_job_description.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/kinunosipod.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_off00017aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17AEF 4616 bytes
SHA-256: b4c1e0e8bc10bba8a4ebe4f6aa3fe78011808ed60c48276edc60fe3540220161
font_01_sfnt_off00018aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AA8 11412 bytes
SHA-256: 60f81b24a814d8c619e1eaa1df4c66e4748be2db1041359bc409f9b231707f1c

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