Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c51748100bd6083…

MALICIOUS

PDF

35.1 KB Created: 2020-09-30 05:40:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ccd97503bd75b4df12ff00ea95c2b417 SHA-1: e8cdebdb9f43d5a9d5363f766cea91ed71eec9bc SHA-256: 5c51748100bd6083493f25b3a6ede63d60c2256e987ebaaa30609ea1725a8a41
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/strik?keyword=o%2527+level+african+history+notes+pdf In PDF document text
    • http://lojub.openheartyogastudio.com/uploads/1/3/1/1/131164250/6608091.pdfIn PDF document text
    • http://files.atfsupply.com/uploads/1/3/1/4/131453817/6937511.pdfIn PDF document text
    • http://worulafuj.intuitons.org/uploads/1/3/2/7/132740815/wiwevinul.pdfIn PDF document text
    • http://belane.ryanchrisbartlett.com/uploads/1/3/1/4/131409090/0eef41e3013d.pdfIn PDF document text
    • https://site-1036724.mozfiles.com/files/1036724/nuburuxevelibokezaki.pdfIn PDF document text
    • https://site-1037086.mozfiles.com/files/1037086/dusunukawuritovilukafex.pdfIn PDF document text
    • https://site-1037071.mozfiles.com/files/1037071/xoredujapejububipimina.pdfIn PDF document text
    • https://site-1037870.mozfiles.com/files/1037870/durakaropidegamezazofop.pdfIn PDF document text
    • https://site-1036938.mozfiles.com/files/1036938/kigevetulojigogapowunoma.pdfIn PDF document text
    • https://site-1037261.mozfiles.com/files/1037261/25513629319.pdfIn PDF document text
    • https://site-1036629.mozfiles.com/files/1036629/wovomiselawovetofetogawel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4008/0023/files/emojis_ios_9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0469/0015/0434/files/strat_wiring_diagram_bridge_tone_control.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4509/3533/files/66650081454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2127/9137/files/cara_membuat_cv_di_hp.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0571/2296/files/oliver_twist_1948.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_off00004b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B00 5468 bytes
SHA-256: 02273f7c450f5dc3af879776e55508dd37e41078399d0cf88106ed8d4dc7fd25
font_01_sfnt_off00005da6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA6 9980 bytes
SHA-256: 88f2759f0eefa492279d0ac839ddcbc5547a9dca1ff4de58fb212dc7025d5fde

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