Malicious PDF — malware analysis report

Static analysis result for SHA-256 6df5ee1114d0b0f4…

MALICIOUS

PDF

66.2 KB Created: 2020-11-19 15:59:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d81850c0c73147e04a8873dea0a29263 SHA-1: 1e999f5f979b4d2af099bc354cc33d8b5ffd3af0 SHA-256: 6df5ee1114d0b0f42c68d36f4571d894cda8b135d9def7be98e137db901a7c08
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://traffking.ru/123?utm_term=potato+battery+hypothesis'. Additionally, a machine learning classifier and ClamAV detection strongly indicate malicious intent. The document body is heavily obfuscated and unreadable, but the presence of a malicious URL is sufficient to classify this as a phishing or malware distribution attempt.

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://traffking.ru/123?utm_term=potato+battery+hypothesis In 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/460bede4-1524-4da2-b605-de10dff9f33b/bo2_emblem_maker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/260ff444-c754-4229-be69-6b1afa1c374b/dogatokivuxukokogeju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27bbe965-c5ca-46e8-a2b8-df58a2c70e16/66322192731.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eab360ef-3db2-4ef1-b41b-f501613415be/22788773401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04fd8820-cb39-47ed-879f-1633bd5140ae/strike_hero_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42f08fb6-5ac6-4367-b595-593de5ad691c/fafiwotirowemubalakaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f17a0d9d-5fdf-424d-9631-847766cbaebb/streaming_spider_man_homecoming_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c52f68ca-e627-469f-9ba1-92a489732428/nomofuduzeluzeworupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10d593d6-3c40-4388-84e0-e1a764da5638/tns_12599_tns_cryptographic_checksum_mismatch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/088ece37-3711-4d7c-bc8d-dacfc0f98ace/78132338668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f4924aa-9607-41fa-9bde-ae60d9bb46de/dawamurolewil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d71f87df-5d58-476b-8d5c-ab0371af4672/gefikisurijumezerap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/947e6221-6e7e-43ea-a7ee-cc4cfc97111f/78099491290.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c3ef111-e9e2-4aba-bccc-903a212ed1b6/78948158050.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2819c1d1-ffb9-42a9-bb0d-0656b8e0c53c/lukumagof.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_off0000c790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC790 5116 bytes
SHA-256: fe97947e26203b81e7dac7866f1df848f7a4e5409da4cde97c8c9305d43278d5
font_01_sfnt_off0000d8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F2 10516 bytes
SHA-256: 5b6082149e7ec1d7ab2a1c00cc0ab18ab8081c703ede691ae05ed4b8ccd95fed

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