Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d89d0ce603353e9…

MALICIOUS

PDF

69.2 KB Created: 2021-02-28 07:18:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c0065c7c0687e7b14ccf31aa18fe1e51 SHA-1: 36ce92100ad74075182732fe9c6fb9d23500aeb8 SHA-256: 3d89d0ce603353e99b67be5a612c74aca2236665c24ea6ac28e4a0f8f6dcd65a
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://resalured.ru/award?keyword=how+to+print+a+painting+on+a+shirt PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4479222/normal_60006a9381eb2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501360/normal_5fcad8f126bae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390659/normal_5ffa394ed1473.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392668/normal_6027e6cdc1e62.pdfIn PDF document text
    • https://vafiradas.weebly.com/uploads/1/3/3/9/133988778/ledijinakej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366406/normal_5fe8a75c5fb33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375200/normal_5fddb640e688d.pdfIn PDF document text
    • http://newser.site/38098891296siclu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413007/normal_60291c3798be9.pdfIn PDF document text
    • http://odebayitrafikhizmeti.com/988186383589wont.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451545/normal_5fee6683c48c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393028/normal_5fe08037df384.pdfIn PDF document text
    • http://hookup681.site/vurutusunaduduxelyzd6.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/vibasujefir/guide_build_ezreal_ap.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_off0000d22e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD22E 5100 bytes
SHA-256: 5b5c65524b61dea0abb460f8518ffa55941bb2ac700e7ffb4c108cade61e971f
font_01_sfnt_off0000e394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE394 10700 bytes
SHA-256: 5ca6fc43e78c79b45507b089af4bb04e546db26adc56058b7da1e72532a98271