Malicious PDF — malware analysis report

Static analysis result for SHA-256 da60f39752f68e20…

MALICIOUS

PDF

41.9 KB Created: 2020-11-09 05:09:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: cdbdd2da9a457728859b7515ccbe6500 SHA-1: 3b2b847b254932f400ba40eac740e80346b2a52c SHA-256: da60f39752f68e20b2ebb4a180c4a95328f3577b627f013865b4ee01f28a0b77
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://traffset.ru/aws?keyword=cdl+permit+study+guide+ky PDF link annotation
    • https://talapilodegopez.weebly.com/uploads/1/3/0/9/130969507/1096138.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446170/normal_5fa4686d452ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380863/normal_5f8c11fcad2a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384301/normal_5f9f8ea3ae25e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382618/normal_5f8bed443f6b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368493/normal_5f8aff7232d13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410020/normal_5fa888bc5d2e7.pdfIn PDF document text
    • https://xinejusitap.weebly.com/uploads/1/3/4/6/134630468/rowopo_naxabubapetefi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374522/normal_5fa17908c6f5b.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/gonuxiwela/keripaturejijamazudipul.pdfIn PDF document text
    • https://lukamukiza.files.wordpress.com/2020/11/atl_2006_movie_download.pdfIn PDF document text
    • https://padapifizi.files.wordpress.com/2020/11/61636937237.pdfIn PDF document text
    • https://manetomimexa.files.wordpress.com/2020/11/68091325827.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/rekugojisokok.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_off00006589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6589 5140 bytes
SHA-256: fdc5a29b14dfc8aded8a5aa88e3bc391198227dbcf055dfd17866534cd9456b3
font_01_sfnt_off000076f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76F7 10604 bytes
SHA-256: c0f2f3ea8287f9e38f8da4d9edb2295e2b8dcc55da37f5bfcb80435fa10c1da9