Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc19b91755ddb6d4…

MALICIOUS

PDF

46.5 KB Created: 2020-10-21 11:13:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: fcd80e207c8cf0e78e8a0a0e0a51ac95 SHA-1: dd9f661dbcc5c4ef0286a1b0d24384ee7324deb9 SHA-256: dc19b91755ddb6d400f8cf0f333f15419f42488966e23e1df115f037f4424e48
94 Risk Score

Malware Insights

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

The PDF contains an embedded link that redirects to a malicious URL, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, appears to contain the same malicious URL. This suggests the primary purpose is to trick the user into visiting a malicious site, likely for further exploitation or phishing.

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://gettraff.ru/wb?keyword=volkswagen%20tiguan%202018 In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/gastrostomy_tube_care.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/osteochondroma_radiology.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/french_english_bilingual_books.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/bekogasopuna.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/data_structures_and_algorithms_with_python_springer.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/dadugifenozegerupukonexa.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/86196733578.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f3faee1-930b-4d03-ba15-8054d74c6ee7/25786726462.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99713c16-03c5-47f8-a21c-35eb4d2cd015/nordstrom_employee_rules.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c88bdf3-c3d7-49b3-9579-af6c70d889b4/gre_practice_test_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a9c3280-c819-45b5-b8bd-8707314be731/enviciate_descargar_musica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1819d445-9598-4200-9b59-56128bec07c8/ridabez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/762e105b-1190-4250-8df7-7bcfe2da8a46/juzemezuto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3677597c-90f5-411d-87f4-9a41dac45d5c/53816011484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08c9cc69-c141-4bfd-872f-d96482d540da/jivodazilasironod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6948c00-0300-4dde-926b-b729d0e9933e/angry_birds_wonderful_pistachios_gam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e738d04a-f445-4503-b0fd-9528f5b946f4/genukijixozesewixovaw.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/distress_tolerance_scale_dts.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/vufigorijatula.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/bad_blood_book_download.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/calendario_escolar_2018_y_2019_sep_195_dias.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52089943-5e98-49ba-b8f4-e9350ef381b1/molamovafelizuresegusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85d39d04-33b4-4328-b4a8-2cc067dc49e9/13618293248.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3af2fee9-449e-450d-9739-3b7d75499e8a/sefonudanodamaxem.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_off00006a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5F 5400 bytes
SHA-256: 7775e9c535101517473aea4f9cecb76c8bca7dd48fddd0c067770549217d76af
font_01_sfnt_off00007cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF0 15468 bytes
SHA-256: 91db6ad44309fe8a113639fc8e7ac93052706598218656fe9e75c6c4e4615858

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