Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f34dff9b4f84f33…

MALICIOUS

PDF

39.9 KB Created: 2020-11-08 00:54:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 4057f30dd0db55ec4b5628d620b0ff60 SHA-1: 0684a32486e1ff5ce974dccfb43bdc2a1d87d15d SHA-256: 6f34dff9b4f84f33012ba167e0b5454354f48ba60df79ba53ebb0c019dc04dee
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://trafficel.ru/aws?keyword=letter+of+recommendation+from+a+coach PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403822/normal_5f91f43036622.pdfIn PDF document text
    • https://bolififona.weebly.com/uploads/1/3/4/3/134316640/semunerom.pdfIn PDF document text
    • https://xikosenazegan.weebly.com/uploads/1/3/0/7/130739601/4dc4d284191e32.pdfIn PDF document text
    • https://nipufijupetobug.weebly.com/uploads/1/3/1/4/131482996/2826043.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445736/normal_5f9d15b7d85a7.pdfIn PDF document text
    • https://mepuralomelefaz.weebly.com/uploads/1/3/4/4/134494325/8d81b1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383314/normal_5f981a0f02be4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379241/normal_5fa6614b231e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387718/normal_5f900508d7cd8.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/zujeguv-xiponofifigum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xubifupi/melokudesoselamawal.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/bachelor_thesis_maschinenbau.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/kitchenaid_food_processor_7_cup.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_off000060e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E5 4992 bytes
SHA-256: dae1cf9f010bc73299e458b09796b2d3b6cf422a24803b754ba3af31fe7e3bd9
font_01_sfnt_off000071b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71B8 9724 bytes
SHA-256: 176840b11875169a5ff978375cb02a0077a7ab2e69b310c1ba43a85b38cbfe76