Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bec9d27b4edd79f…

MALICIOUS

PDF

40.0 KB Created: 2020-10-30 11:42:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a003c51f0469dc93f290be84951c85be SHA-1: d8b30d7f381d43b8205a3b1667fc0b03a32e6ac1 SHA-256: 0bec9d27b4edd79fefcc5f997ec9dcd1ba07ed0c8ce463d31e9d54e5c97e384c
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://ggtraff.ru/strik?keyword=residents+guide+to+ambulatory+care 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/a0083e01-27d5-473f-9be7-0d5017c15489/beautifully_damaged.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/dipibo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0be7e0a8-f9fe-41df-95cc-7e30d4875a27/kenefovusolisibomupuwe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2192ac19-868d-4986-962e-0e33237b71e1/75292123377.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f730c7e0-425c-4da2-b76e-7213afb10319/wadajobaki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f31069fb-726d-4519-9b11-6c409f646040/dowavemaxorobalisilurur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f05ee7c-23b2-4922-9506-67707f3bbf84/60133996773.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb039c18-d7d8-4a89-b44b-dbb9c3fb5433/vifejedidodiwubat.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/saxemavuziropasimeba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60167c50-0ecc-4cfa-a23f-8156a981e688/ish_by_peter_reynolds_read_aloud.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/trumpets_for_sale_gumtree.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31f27b83-58e9-4b39-80b3-0175dbffeefc/nixetuzavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00c49535-d6c7-42f4-a374-e30b76950988/crookedstar_s_promise.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_off00005d34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D34 5508 bytes
SHA-256: bbb4ebe751ac1658a0253ad55532b2b053f21af3a198c1eddc1f856560e57c71
font_01_sfnt_off00006fe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE1 10436 bytes
SHA-256: 48853f1900223e011404308c3ecde28070423b86cd6f525f101fe8f32ebbfaff