Malicious PDF — malware analysis report

Static analysis result for SHA-256 1735a14bd8c4b6e7…

MALICIOUS

PDF

41.7 KB Created: 2020-10-01 20:21:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 349d24d21f2ba42421fee56d21736f6c SHA-1: ac1615d412786eb0fd3f5f0fb9991a4b8518fb0e SHA-256: 1735a14bd8c4b6e774c86e797b4672416c666a67841b50a4368138d221f74deb
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://cctraff.ru/strik?keyword=enfermedades+por+avitaminosis+pdf In PDF document text
    • http://files.carolinewisejourney.com/uploads/1/3/2/3/132303238/pekiledawovu_jotojojobe.pdfIn PDF document text
    • http://files.theresemcinerney.com/uploads/1/3/0/7/130775254/pozudixepa-runabivoxew.pdfIn PDF document text
    • http://lopajol.urgroupsingapore.com/uploads/1/3/2/8/132814930/gopiga-wagofuf.pdfIn PDF document text
    • http://kamamaf.hooksflyinghranch.com/uploads/1/3/1/4/131411150/xobutesofas_wofotuweleligu_divoxuguxer.pdfIn PDF document text
    • http://files.thechamberalx.com/uploads/1/3/0/7/130739744/filibuwasutenim.pdfIn PDF document text
    • http://zakako.yellowstonebiblecamp.com/uploads/1/3/1/6/131606575/zutulod.pdfIn PDF document text
    • http://files.hannahsroorart.com/uploads/1/3/0/7/130739298/2826913.pdfIn PDF document text
    • http://files.stgeorgestbishoyvisalia.com/uploads/1/3/2/7/132712154/bilozipogopulezabu.pdfIn PDF document text
    • http://somet.utahyouthcourts.com/uploads/1/3/2/3/132303354/jurimagilivom.pdfIn PDF document text
    • http://wawoze.michiganrealtysolutions.com/uploads/1/3/1/8/131856331/1938115.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/1/0481/6247/2091/files/uta_arlington_fafsa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8145/2706/files/63514859279.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/exposicion_al_santisimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6387/5486/files/difference_between_hawk_and_eagle_and_falcon.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_off00006225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6225 5172 bytes
SHA-256: d72d2746c2acf20631efa81a955457e1d7bac92faa9f8717dd21c58b4719a9b0
font_01_sfnt_off000073ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73AC 11372 bytes
SHA-256: fd774792f1f1e854dd69c1cfde35c9da617d2bdacf45ff05dc8e531eee1218eb