Malicious PDF — malware analysis report

Static analysis result for SHA-256 43740da50d0938b1…

MALICIOUS

PDF

42.9 KB Created: 2020-11-08 11:23:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 07763c6e12a678fd65ba4f7e4d8bf315 SHA-1: d3f3e80010d713942ea2c79ed55a5dcd0065763f SHA-256: 43740da50d0938b1ec8ee15f30aea0fc3ccf9607b8a3c62b08350048c008ecbd
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?keyword=donald+davison+murphy+nc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368745/normal_5f8c5135bfd96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393348/normal_5fa302011d881.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/67bfda00-a87e-4712-8234-cab6b6f67bad/sapidifowoxezube.pdfIn PDF document text
    • https://lodoxepal.files.wordpress.com/2020/11/reremuradivuvevedivogobid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/765894d6-eeb4-439b-bee3-5222dcc55e0e/fepujokidojozowoxet.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/bhagavatam_sanskrit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6150de1c-f8c7-457b-9f55-c2e79b6e08fd/62877599671.pdfIn PDF document text
    • https://bilifib.files.wordpress.com/2020/11/sezoximexunalaliremutegu.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/primal_core_gnc.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/mufixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/133948b4-be60-4748-ba2c-2fc06c5015be/degufojugidadimumutufev.pdfIn PDF document text
    • https://pupirod.files.wordpress.com/2020/11/nozemapopumetuve.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/wuvemixuburudupiwi.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/78901439413.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_off000063c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C8 5472 bytes
SHA-256: efcbdde051ee03b7f9210fa51ca2fefc24cb1f6148e2976de2cd75a6a58c2ef1
font_01_sfnt_off0000764b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x764B 11728 bytes
SHA-256: ab423d8e02b27dec6d4e655c102b29dee490bf9c5d1bc088afcf270be68bd620