Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfc6f232a930333d…

MALICIOUS

PDF

52.5 KB Created: 2020-11-04 10:08:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 6a4ff841e01c3f7537bf39d0f69e1aa0 SHA-1: 7be0ae24d43299164503948c3d11dc14e975c464 SHA-256: cfc6f232a930333d58596fd9ba3302165d82408b8c8496b132039689c6117245
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text that suggests a lure related to a spreadsheet, likely to trick users into clicking the malicious link. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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.
  • 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/aws?keyword=golf+clash+wind+guide+spreadsheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366340/normal_5f8fda131f57d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388280/normal_5f951b88bc4ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380674/normal_5f8d84269f1c6.pdfIn PDF document text
    • https://ruwadegefanum.weebly.com/uploads/1/3/4/1/134108857/muvekaxutix_fizoke.pdfIn PDF document text
    • https://vaxajiwozoli.weebly.com/uploads/1/3/1/6/131637631/xolul-tamolidelimokew-gijelumazu-wuzogozipebe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421460/normal_5f99e5faf3e7c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/7ffa780d-5567-48fc-ab93-8ff98a6ba1e3/spilled_milk_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/778b4be1-f012-473a-946d-670518ec4d8a/62428504637.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/what_is_the_acting_out_cycle.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/xiwofabeguk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bbf3498-5c51-40b9-82fe-338c44ae9262/50774534204.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/fegup.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/13277146721.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/tabemuk.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFE 5424 bytes
SHA-256: 3e2a9ad8c35cd57a56445fce4eeee43fe6d7d8b21889ed624712e18b6acd54be
font_01_sfnt_off0000706e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x706E 1976 bytes
SHA-256: 25ba19f0a4162ed85075bb63632c7c15bf8fa44e699f483dccd13be66c5b78a0
font_02_sfnt_off000079ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79AC 11060 bytes
SHA-256: a694416c686298fa9ddda8f798c1514a4e4bb9f66df876aa02d6f059bdc6c64b
font_03_sfnt_off00009f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F01 16344 bytes
SHA-256: f84adfb139fdf49e27485feb0fb92b79055cb8d51cff817362774f5b6e7cd2b5
font_04_sfnt_off0000b493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB493 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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