Malicious PDF — malware analysis report

Static analysis result for SHA-256 2762dda0b05c9dca…

MALICIOUS

PDF

42.6 KB Created: 2020-11-02 11:45:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: de6c4ec4afa3de36b5ee3e17ad9183f6 SHA-1: 837e6a3828b23e7c745766e12bbf44a8f6fe30a5 SHA-256: 2762dda0b05c9dcadc71fe425cfcfb7aa417e5c1a13c27251c1ff8742759f26f
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it's a malicious redirector link. The embedded URL points to a suspicious domain that is likely used to host phishing content or distribute malware. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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/strik?keyword=snap+on+solus+ultra+ebay In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366959/normal_5f873cec413dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374545/normal_5f8b392faeaae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369779/normal_5f9082be1960c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368242/normal_5f93cc0a411b2.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/nimuwet/sizugitebor.pdfIn PDF document text
    • https://s3.amazonaws.com/nisoxow/dungeons_and_dragons_cartoon_intro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5334e60f-a8c7-4813-9eb1-1269aea3017a/53606159243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c2e8fb0-c830-4cbe-bd48-1662df0b0a55/filuxixigego.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/certificado_medico_ministerio_de_salud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cf7eefa-5990-41af-96b8-e1fa9f9f2b98/20441204937.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/16837905113.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/685ebd30-da01-4691-8bbb-ba452e0e8bb5/34314576315.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/8_week_calendar_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/182a22ab-5d05-4f86-8b1d-7f09fae3aaf2/36917493776.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/nefosonuvuluretuwati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9775ab7e-afa2-4692-aadf-39f75713bb2c/toradora_english_dub_vrv.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_off00006690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6690 5156 bytes
SHA-256: 707bc20db66542a720d82c781c439d6a0ef17c784ac9eb7b46a6df4c5ceb4720
font_01_sfnt_off00007826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7826 11112 bytes
SHA-256: 3177ce040749c13c2bb50ca074998f22f5af9a4297a0cc1316f0366091beea39

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