Malicious PDF — malware analysis report

Static analysis result for SHA-256 90d564c098eb10b0…

MALICIOUS

PDF

70.7 KB Created: 2021-02-22 02:21:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: dbd5daccaea75b206e9322217692d7ea SHA-1: 5c04257541404ae9898dd7e1e51cdb5374432759 SHA-256: 90d564c098eb10b01dd2fc542bb238cf6b896e25b7fbcb6c2fda1e7eb6b26b13
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/wix?keyword=ap+art+history+review+book+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4463785/normal_5fe3d54413f31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459479/normal_5fe0be31a6ad6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458848/normal_600beed7f2f58.pdfIn PDF document text
    • http://bigwin-1xbet.fun/lakikbtgfp.pdfIn PDF document text
    • http://vknart.xyz/translate_binge_to_spanishum5ku.pdfIn PDF document text
    • https://tokemenar.weebly.com/uploads/1/3/4/3/134337898/9672637.pdfIn PDF document text
    • https://wovipoxutoluku.weebly.com/uploads/1/3/1/3/131383624/mizebufarexu_zadirozekakelel_mewegaxenax_nukogu.pdfIn PDF document text
    • https://winapusumebut.weebly.com/uploads/1/3/4/6/134695108/tekimixe.pdfIn PDF document text
    • http://drive4mclaneaustell.com/141067781681xsah.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420239/normal_5fe2da3a0fff0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448137/normal_6005e68ef0013.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/zosevid/comment_afficher_les_formules_sur_excel_2007.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/wheels_on_the_bus_go.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/8978577151.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/27344982589.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/lean_business_plan_template.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_off0000d796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD796 5544 bytes
SHA-256: fe5f6d49f03be0f938227ffacf9542f1b63a1a6bdf9b18962155cbae875d137e
font_01_sfnt_off0000ea84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA84 10548 bytes
SHA-256: 6eec829e802d0c5f49149912b7c2954faf24bb786e791251a6ab67301db34eeb

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