Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f4fa4b87dbe8337…

MALICIOUS

PDF

78.8 KB Created: 2021-02-17 18:04:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 5a42d2b76887e3571345823e6d9f40d5 SHA-1: b1054e77d79f97ab83277e120fdeff7d10b3f70d SHA-256: 6f4fa4b87dbe83374f94dc5895bb6451f9efd3b51b3199f2ede4f763ce9d593c
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wb?keyword=how%20to%20wear%20a%20mask%20properly%20pdf PDF link annotation
    • https://jegobagugixados.weebly.com/uploads/1/3/4/8/134858953/vomavexido.pdfIn PDF document text
    • http://worldhold.online/26865473192eqhqb.pdfIn PDF document text
    • https://zazobowelukoki.weebly.com/uploads/1/3/0/9/130969428/2d789d5459237.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473618/normal_6020398954651.pdfIn PDF document text
    • http://sweetygirl.club/coloring_books_for_adults_free_downloadz9nws.pdfIn PDF document text
    • https://pixebekisutajud.weebly.com/uploads/1/3/0/7/130775176/ravibawinoje.pdfIn PDF document text
    • https://gakatonigi.weebly.com/uploads/1/3/2/6/132681340/fenedevawim-ratewuguviseto.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489716/normal_5fedc83bdcf88.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480170/normal_5fccc2cd53972.pdfIn PDF document text
    • https://nonokutofukidob.weebly.com/uploads/1/3/4/8/134872148/da0aac.pdfIn PDF document text
    • http://anrostore.ru/72448010502soy18.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/sebunuzu/babasaheb_ambedkar_image_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/6156799709.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/keratina_recamier_sin_formol.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/lucid_dreams_sheet_music_free.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_off0000f82b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82B 5404 bytes
SHA-256: 5cbbd0ab1cb3d7c699cb75a70eba2639bf9466407f06dd9cbfcc62e4effe38f4
font_01_sfnt_off00010a93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A93 10472 bytes
SHA-256: ea4c7719826b7ef6b5a641f76f1f7e72be9cb69e7711a26703069a48441addd0