Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b0e39977ef3c663…

MALICIOUS

PDF

43.4 KB Created: 2020-11-03 12:14:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: fd271faa59d17365a32b6a97334e0798 SHA-1: 182f53d0607d9486b9b20a161c1501ec2da9e51f SHA-256: 1b0e39977ef3c663b02d7b37f66490713d8681acfa996ce7c7fec9736cab484d
94 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a known malicious domain, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged the document with high confidence. The embedded URL is likely intended to deliver a malicious payload or phish for credentials.

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/aws?keyword=how+to+delete+duplicate+photos+apple+photos In PDF document text
    • https://cdn-cms.f-static.net/uploads/4448744/normal_5f9ed516f26ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366366/normal_5f8a566eb92af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386605/normal_5f91e1077820a.pdfIn 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/449bff61-cd8f-4401-8d39-55bcc5b51e50/mugadovigopozitotozajevu.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/18194374742.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f9349e4-5510-4711-b1c9-721b8bc75fbb/fulumagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/884033e6-6a92-4d46-8129-f06939e0848e/42253732693.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/socomec_atys_6e.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/febixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca108e68-4607-4715-a8c1-4e95697f4a13/12929449171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3929079-6460-437c-9d8b-b5d85f7808a2/honda_accord_2016_manual_transmission.pdfIn PDF document text
    • https://s3.amazonaws.com/pusumowi/apk_store_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/xapebapawabowoxasuwimi.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_off0000697b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x697B 5120 bytes
SHA-256: 1158b42280f7999fb77726f3020b9d715eadff2fe32175a445c5a1384bcd4a7a
font_01_sfnt_off00007af2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AF2 11040 bytes
SHA-256: 29a0537e28898c44b99ae0971cc7f124b9ec26508d97a6456d0ed7b10103c77a

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