Malicious PDF — malware analysis report

Static analysis result for SHA-256 519026ee5d534ce6…

MALICIOUS

PDF

45.3 KB Created: 2020-10-06 17:19:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: db5165503f03e6ffc250ce0649e2c761 SHA-1: e2f9604208586c651dce20a1eecae4c426b591cc SHA-256: 519026ee5d534ce647321a35808f9a4da197a11b1c32d6311adf9cc0e2fc14b0
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=riptide+guitar+notes+easy In PDF document text
    • https://site-1038313.mozfiles.com/files/1038313/zowikefir.pdfIn PDF document text
    • https://site-1040896.mozfiles.com/files/1040896/56684323794.pdfIn PDF document text
    • https://site-1037821.mozfiles.com/files/1037821/riwajijotami.pdfIn PDF document text
    • http://sazomo.saratogadandia.org/uploads/1/3/0/7/130775853/sufefimudinotusa.pdfIn PDF document text
    • http://lagujo.kelvinf.com/uploads/1/3/0/8/130814297/bf9ff8a3bfdb.pdfIn PDF document text
    • http://files.ycducky.com/uploads/1/3/1/6/131637477/7211106.pdfIn PDF document text
    • http://vagurawu.dianedailydose.com/uploads/1/3/1/0/131071258/e2bb8df.pdfIn PDF document text
    • http://files.uplandmethodist.org/uploads/1/3/2/7/132710661/nevojew.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/1/0430/0485/4426/files/evidence_and_property_control_specialist_exam__9030_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9662/7618/files/30087799345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2083/1904/files/3850467382.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9002/5375/files/fable_3_demon_doors_aurora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8320/9631/files/salvation_by_langston_hughes_thesis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B79 5204 bytes
SHA-256: 96d19e2517a5c6deb7ab7378c113c7f75c1941b9ef1a8473391eae2c6ec5e21c
font_01_sfnt_off00007d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D40 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off000085cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85CD 10088 bytes
SHA-256: 3ca85101ccbbf7bee1a0e80ee0ac967cc1fcd766cc31b86eaa87a6345b4ecdc2