Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbbad53cfea57204…

MALICIOUS

PDF

43.4 KB Created: 2020-11-08 10:51:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 600bf2f7da1645776cb400fc0134715e SHA-1: c6c697824e801791bda66cbbcaf72d6d520211ae SHA-256: bbbad53cfea57204ec6de48203054fcc2df69476b08bf96768d1d4170d63a719
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://trafficel.ru/123?keyword=bongo+drums+ebay PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388815/normal_5fa1f3867114e.pdfIn PDF document text
    • https://lukafove.weebly.com/uploads/1/3/4/6/134655473/pozezij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402520/normal_5f9266d1be7f0.pdfIn PDF document text
    • https://xigokerurubupa.weebly.com/uploads/1/3/4/3/134312623/jojakirak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367938/normal_5f8d12007749f.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/finitinezagemego.pdfIn PDF document text
    • https://xilorufanil.weebly.com/uploads/1/3/0/7/130739938/luduluvemaker_vesugusadire_dusuwul.pdfIn PDF document text
    • https://viwezoluzuwa.weebly.com/uploads/1/3/4/4/134401695/e14e1ed.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/79b85469-7c6e-49c8-9fe7-8f25cc2a0452/mukoni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef5d307b-a188-4da6-9f9f-e7ea6d2bcedb/13903819190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43365b5d-f5df-461b-9f9d-ca0172a6c3e3/cursive_writing_capital_and_small_le.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D89 5156 bytes
SHA-256: a46f50b68ca286046cffb26ab4f65c3a52a16c1ffbc953d30e15c6113997e71e
font_01_sfnt_off00006ee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE7 10880 bytes
SHA-256: 2b93e3d72300edcf9371acbec197092ad50e8af1f830d7b8636a525e5e81314e
font_02_sfnt_off00009342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9342 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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