Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0977fae9c0095e6…

MALICIOUS

PDF

51.9 KB Created: 2020-11-08 15:51:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 77525aa4ceadab3c36312b7366d58fbb SHA-1: 4bc7869c0b377832dc4638b9209e603aa21ad175 SHA-256: f0977fae9c0095e655dc1cf96178a9d16cb473f46b4832a598084a3ed8d53c9f
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://trafffe.ru/aws?keyword=pdx+airport+arrivals+and+departures PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391024/normal_5fa13077732f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5f874edb3b13c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/0d0d29b5-bc93-4902-bf07-be5eb384d529/alice_in_wonderland_clipart_images.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/323d1295-1956-4e30-ad61-39c31178112d/zonupu.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/palovusinaki.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/pulpo_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/13561424855.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/59377632936.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63a5ec4d-d3fc-4d86-9f1d-1fcb588fc11b/35889592905.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/orthopedic_shoes_boise.pdfIn PDF document text
    • https://fetivenaje.files.wordpress.com/2020/11/7653655170.pdfIn PDF document text
    • https://zuzoxet.files.wordpress.com/2020/11/lowokotanibutelol.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/danujavugaxawegope.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6877 4964 bytes
SHA-256: 9b3dc1072d4a21c84525e7e094f81fd16a7a3e269b01d6217fb5b26f0e379aa6
font_01_sfnt_off0000796c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x796C 11008 bytes
SHA-256: 32012e44aa159ea3987a6d25037c81cc84ed45fe6ddfc2f63428d217d3c62200
font_02_sfnt_off00009f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F4F 16140 bytes
SHA-256: 1ffca1ef16be5e2ec436e77f9211a88ad3199dc781cb76600401cc2e2c7dce6d
font_03_sfnt_off0000b44b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB44B 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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