Malicious PDF — malware analysis report

Static analysis result for SHA-256 26d0267d26662449…

MALICIOUS

PDF

51.8 KB Created: 2020-11-07 09:20:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 9d9db7623bff9d1ff271b7072f0c4430 SHA-1: 87b607e58232fd345bc88dbd5e6da21b4056ef6d SHA-256: 26d0267d26662449385d057af1495d88fba1dfe40fb1803e09ff28ed37379ee0
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=onn+wireless+headphones+driver PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391303/normal_5f954c2410b54.pdfIn PDF document text
    • https://tisatazufewuvo.weebly.com/uploads/1/3/1/1/131163687/dijijofatusexapig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412757/normal_5fa0597577836.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f873a93931fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5f95ad35a06f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445325/normal_5fa633c265a34.pdfIn PDF document text
    • https://kilunifogewawo.weebly.com/uploads/1/3/4/4/134457757/6447532.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/5bbb8f8e-4ff0-47ed-b3d1-3f0024c3e235/zusobukuv.pdfIn PDF document text
    • https://zolaruve.files.wordpress.com/2020/11/pelicula_sing_en_espaol_latino_comp.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25915195-c9ee-4f08-988e-361b2f32a652/loxisufas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21420a25-4256-4e3c-bb8c-cd3858c0d2e6/rerarururidax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1edbc844-8116-49f7-a666-db99b7a54a74/fezibukoso.pdfIn PDF document text
    • https://vabavoresadi.files.wordpress.com/2020/11/debewasomogoro.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_off00008c50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C50 5224 bytes
SHA-256: e3f2417525f7a83ebd2ed37b4951277f0716eb190237c77b7477bab424b3348c
font_01_sfnt_off00009e22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E22 10812 bytes
SHA-256: 67c2255ab9bb7049f8ebb72c42495ec3896c89375ac0e4f64e2451430b578a82