Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cda7dccabad5daf…

MALICIOUS

PDF

51.2 KB Created: 2020-11-06 17:54:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: d3de1fab23bf89b581556d76e84c4184 SHA-1: 2802ecc059cd95b0451e9ba54a8c878340f8464b SHA-256: 0cda7dccabad5dafb7e152cc9f98f80e78f84f49abda755c3063238adb2650a0
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffking.ru/123?keyword=chess+queen+starts In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376625/normal_5f95735c52de3.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/3ead0fac-7313-4718-9981-7b78c550cd20/35215465074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd42b6ac-0f13-4a70-bd21-daa1fb555669/53149398951.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/data_mining_process_model.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b0e7a61-0dc8-4705-a4c4-deb787982381/borupimajemo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a03cdf9-14d7-4772-8b7a-de305bac4a23/active_and_passive_voice_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e391f89-1696-4168-b755-d59ee059cb80/97207339471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b346e716-2ce5-4887-b834-994b2912d4dd/xolakukinumisekuvediwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41ed5f47-fed5-4099-ad71-5fc611bbb4ba/kambi_kathakal_written_by_master.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b89b029e-a09f-44b9-8764-aa6e27da40c4/the_king_of_fighters_ultimate_mugen_pc_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63eef1e8-3568-4cb8-a226-ec48ca90dc96/pebimagotim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/609bd06f-67f3-405a-9825-fec074b3e8a9/65376642719.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/92362233606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e1aa59e-8bfd-4442-8148-07cd609d6ba9/22485688459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea70e759-5b86-467a-821d-2e8725ea7de7/petenwell_flowage_ice_fishing_guides.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC3 4772 bytes
SHA-256: 1cadfe6bd9ccf20518d9319a7145814eaae776738f71a98f71d625d3c096d774
font_01_sfnt_off00007ef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF3 12952 bytes
SHA-256: 6051c909d838fb97f4ca3e6803983c999a0c1e42551b1a97d62ec7f1fc90baa0
font_02_sfnt_off0000a7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7BC 17136 bytes
SHA-256: e50d80edca6be9c7c83d6387d0949af8519e3d325b0ae9204199ca1183ffead1

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