Malicious PDF — malware analysis report

Static analysis result for SHA-256 28b437a093d7720c…

MALICIOUS

PDF

73.1 KB Created: 2021-02-27 11:37:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: ce410c84661d111d8223bce97ec3d4fe SHA-1: add19c34ea918aea253c947141c0c01ea47fb585 SHA-256: 28b437a093d7720c584ed88641e478c6fa83723f93ee81dda3ae4db3b96a2da4
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://jumiwimov.ru/wix?keyword=blackout+contact+lenses+amazon PDF link annotation
    • https://pefojefevofat.weebly.com/uploads/1/3/4/6/134659321/lixikanoma.pdfIn PDF document text
    • https://visofamawuri.weebly.com/uploads/1/3/2/3/132303269/fogufin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449629/normal_602178b52fbac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387711/normal_5fcb57314819a.pdfIn PDF document text
    • http://janexik.22web.org/lizorefezotud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392191/normal_5fe8da4f5aeec.pdfIn PDF document text
    • https://kifesajisibak.weebly.com/uploads/1/3/4/8/134884742/3c390407f5e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470692/normal_5ff906f614e2b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413835/normal_60015692b9b73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387706/normal_6026c667cc667.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375531/normal_600437e5a4cd3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457861/normal_5fe2bc16a852c.pdfIn PDF document text
    • https://luzozesojuximu.weebly.com/uploads/1/3/5/3/135321468/gamavafifexalapoku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470535/normal_5feee61a9c582.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497372/normal_5ff40c3956064.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fifomivosa.rf.gd/bollywood_hd_song_a_to_z.pdfIn PDF document text
    • http://wajodojizofe.epizy.com/languidece_que_significa.pdfIn PDF document text
    • http://zebigibozudival.epizy.com/sivijijuvokakerowixat.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_off0000e196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE196 5012 bytes
SHA-256: 0da44b4d2294d9579a8e4d309a7ec283985e0e07c0ecf3296282df7026f8e004
font_01_sfnt_off0000f29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29F 10600 bytes
SHA-256: a0b1a6b1afc18bcf4cd2cc556e1196cad331b7cc5d223e9ac95973b1c214bd29