Malicious PDF — malware analysis report

Static analysis result for SHA-256 be91133967e77da2…

MALICIOUS

PDF

49.6 KB Created: 2020-09-30 11:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 6ca443b58aba785e409041373febf018 SHA-1: 57cd5fdd97de8dd326f0959dedce5baff7c70613 SHA-256: be91133967e77da24a02b14375701419cb8342bd7c33785d1962d5f9288e00c7
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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=los+compas+y+el+diamantito+legendario+pdf+descargar+gratis 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/e8b3b90d-c241-4634-ba30-9803b141b592/jiwukuzasakekelimuzam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1291addd-03f2-49d3-b46b-2bdb21738f21/xelajivewufimajod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/129c5cbf-95ed-4f4b-a28e-852df0e9aabd/fuxeruvomepasug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17c86bed-9da0-4640-8837-71c46ac225f5/16152591790.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c63af08a-2f05-4ae7-8cb1-6acb3f038ff6/gifasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3534835a-5467-49d1-9903-0fc528e516e6/14952416718.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b72aa80-088a-4fa4-b513-00aa2c178f3e/29016431926.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61b71d40-ef52-4ac8-b612-074724aad359/nobigago.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d14deb8-fc32-4e0a-a0fa-aae43ff5a22e/pimolajovupar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fda2c97d-ab73-48c8-a039-b70168a09d9b/jejorolakeze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaeae73b-a7f8-4cd8-8cfa-a3829919a740/kigibovuwipagokebefiri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d716433e-48e9-4fbc-95b9-4dd05215117f/87604019140.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a8744de-6b33-4fad-a593-97a8fa609f26/tilawoboduvutafuses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47fded78-bccb-4c81-9045-ae662643e403/7821396577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43083e61-1ec4-4251-bd9d-dd088191a2c7/difijedewajumufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf972c87-2bff-49cc-b386-55328a27b473/jepisifogi.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_off00007fd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD6 5516 bytes
SHA-256: bd1445e8816a8432cbaed7bbcaa0269e7f4c5f05bd2b9d2d9ce685fcc0a02037
font_01_sfnt_off00009290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9290 11336 bytes
SHA-256: 6b5234066211bb3e8431bf0a9f0d18b183c5b584829575c84ac972e09a7569de