Malicious PDF — malware analysis report

Static analysis result for SHA-256 c367b05eb8760c63…

MALICIOUS

PDF

39.0 KB Created: 2020-10-06 20:16:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: a08f6a8b253ed5d9813546b8651b4ba4 SHA-1: e3358a1c891365a56d8fb8dab021e5492eff07a7 SHA-256: c367b05eb8760c630fb8fdf03a42c0d75877c617adf9c65183d037c4a99779ad
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=bandler+nlp+pdf In PDF document text
    • https://site-1036886.mozfiles.com/files/1036886/dibojetu.pdfIn PDF document text
    • https://site-1036867.mozfiles.com/files/1036867/disatisapajazafavarerov.pdfIn PDF document text
    • http://files.grousemesaoutfitters.com/uploads/1/3/1/3/131380889/9621249.pdfIn PDF document text
    • http://files.marketingaz.com/uploads/1/3/1/4/131438443/jisujakebudefibogo.pdfIn PDF document text
    • http://files.wisbeywoodworking.com/uploads/1/3/0/8/130814284/bbd4d2cec.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/1/0429/5573/5193/files/tazipematowenaboxejobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5018/4085/files/truth_vs_fact_quora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6158/9669/files/1059522313.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/0780/7125/files/43268760304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2107/2541/files/tommy_emmanuel_lewis_and_clark_guitar_lesson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0994/1415/files/cause_everytime_we_touch_i_get_this_feeling_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6418/1404/files/driver_and_vehicle_licensing_authority_ghana.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_off00005cac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CAC 4908 bytes
SHA-256: b37af0fa7997ed6109961245661a27edf73bfc818bd0069657b954224d8ecd0a
font_01_sfnt_off00006d6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D6F 10144 bytes
SHA-256: 3b46ed33b778966488b4c828588844be494f98a3149c5db343ef323cdbf85980