Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e88714f74e0a9ea…

MALICIOUS

PDF

41.0 KB Created: 2020-10-03 05:00:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 629699dfa2eee57b27850c7e83ba287a SHA-1: 724137f85abe1a7020051406968b30feb320d99b SHA-256: 9e88714f74e0a9ea05b0d98fc9a9f7be3a3928732fbedc2247c53ec9b1895722
94 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a link to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the primary purpose is to lure the user to a malicious site, likely for phishing or to download further malware.

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=what+happened+to+couchtuner 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/a7964d47-7604-420c-bad0-27e548f7f727/50341114062.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/324bdbb6-d98b-467c-94d7-3937f37d15b7/zoduvagadan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0b1e7fd-99c4-444f-9d85-5f7426501aae/xubiwixukitomozanome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b424f29-6d5a-459a-bfb7-00926076dde3/zumemuwizesosoxase.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f91435dc-807a-4a9d-bfcd-1e50156abf39/misenekiger.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8dd1645-3b08-439d-96a8-d9a2cf320504/85173166769.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/783de68d-7075-49a4-8f55-5e550a656d8d/91030690965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be8fa870-4b3a-420b-8048-534fa383ed09/zetodibi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a97ad3c-9099-42ee-9616-6dc621723cf4/72927007491.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/359bf2b1-e207-4c5d-9617-66bd385401a3/gafed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4357372-2727-4b6d-a0cb-1ab1e7841b04/doxijavobilepezixumuniduz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df753566-27d1-47d1-8522-84dad7696d8a/89947840098.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c37de6d-3456-4d51-9c27-abdc5a3ec1cd/49071770907.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f24aa754-5916-4402-bd2f-339ad5e66fd8/foselem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6457968-d12b-4afd-abd8-c1ca780c4a86/18164397646.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dfca7a6-0e22-4bbf-ae5a-1273b67b7d09/kelolomig.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_off000062e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E4 4964 bytes
SHA-256: 530b72de57561b465693a9ca2698bae8e40e1ba390d9f2b7bfb9063d118c9168
font_01_sfnt_off000073cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73CF 10404 bytes
SHA-256: ae989651ebbd77ca868f3c2e065344f0d8d8533f9bacbaab5d6a4875090e4580

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