Malicious PDF — malware analysis report

Static analysis result for SHA-256 51ebb446138c0334…

MALICIOUS

PDF

42.7 KB Created: 2020-10-05 12:52:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 80de5b9b83c195bf2ed186c9ea2121c6 SHA-1: f57549fdf2645b41b9936bbe81cedcb29300e4c6 SHA-256: 51ebb446138c0334e9fce98852fb71631116cbc7a151dfb3f56be37b862285f8
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=descargar+libro+el+secreto+de+rhonda In PDF document text
    • https://site-1037081.mozfiles.com/files/1037081/lonomeripiburovitaru.pdfIn PDF document text
    • https://site-1043805.mozfiles.com/files/1043805/vagamefimaloze.pdfIn PDF document text
    • https://site-1038304.mozfiles.com/files/1038304/3103866373.pdfIn PDF document text
    • https://site-1038605.mozfiles.com/files/1038605/26751625122.pdfIn PDF document text
    • http://files.tiutimes.com/uploads/1/3/1/6/131607163/4033191.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/1/0433/4521/5637/files/rifizitunedet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1799/3877/files/koritebefoligag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2764/4072/files/fodotazukagis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/1996/4063/files/aqualink_rs8_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/8137/4365/files/tedunewenodawovumumufe.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_off00006553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6553 5340 bytes
SHA-256: d15ca85b44de9dce98e8567d6bb5e442e89aaf3db23d9ed4cd83894d58f0a3b2
font_01_sfnt_off00007772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7772 11368 bytes
SHA-256: ac99e811749a63b9c6f25b94cd95919a93433d1663288a0570ac63ecb91c03cd