Malicious PDF — malware analysis report

Static analysis result for SHA-256 861e2d2cf67f094a…

MALICIOUS

PDF

70.2 KB Created: 2020-10-26 17:04:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5e5f18a57f59e781fdf299bd755c8246 SHA-1: 79a80fd63a6712e96045edffad1dda228a857877 SHA-256: 861e2d2cf67f094a222b6946cd34fa40faae0c95736ad187ec5c28876bef1135
94 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The document body, though heavily obfuscated, contains text related to an organizational chart and includes the malicious URL, suggesting a social engineering lure. The ML classifier also flagged this PDF as malicious with high confidence.

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=organigrama+de+tiendas+oxxo In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371786/normal_5f95f5d85d9ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369797/normal_5f88724937d1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375890/normal_5f8bc47a530ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368964/normal_5f878c599d32e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368760/normal_5f88993532f85.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://s3.amazonaws.com/lupuvogotog/digital_logic_circuits_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/9405562855.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/26234998505.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8be4d78a-ec18-42e6-92d8-e658e77d2f46/intempo_bluetooth_speaker_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dea750c9-2458-4b2a-be82-e67c930f5406/merironegamawelin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f877c23-4e44-478c-ac6e-0cec3e77338d/34533469783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b8b6bcf-5307-4f60-98f7-bb1f337bad89/memarekifevidejejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/4481/5007/files/form_i_102_processing_time.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/6538/4359/files/60191733054.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1385/5161/files/2020_mazda_cx_5_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0281/4876/files/zukulowototokig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0488/5236/9595/files/jolajiwemawave.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7120/4245/files/10549725957.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A9 4996 bytes
SHA-256: daa8b8ea9074bb9df4e622e3b5d179f2eb199749e65bd6d16a1df57c01be3a62
font_01_sfnt_off0000d489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD489 12640 bytes
SHA-256: 8331a4d0798ec432fd13afec9886cfa9884c4f9678a833a628a16500cb18bc4b
font_02_sfnt_off0000fd86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD86 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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