Malicious PDF — malware analysis report

Static analysis result for SHA-256 773d7d5f3283b733…

MALICIOUS

PDF

44.9 KB Created: 2020-10-02 13:17:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: d635994db95803635beb54b63c41136a SHA-1: 62ebdee71bd51334708688a699966cce42f2731b SHA-256: 773d7d5f3283b73360bbc9e3aabf26e9e7cb73518bd5c9edc89261bbf5b9c8e3
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=diagram+3.1+the+fluid-mosaic+model+worksheet+answers In PDF document text
    • http://files.mstbaldwin.com/uploads/1/3/0/8/130813301/525b793142.pdfIn PDF document text
    • http://feferu.wendybatt.com/uploads/1/3/0/7/130739595/2581889.pdfIn PDF document text
    • http://notereg.indyanda.ca/uploads/1/3/1/4/131438563/zixojusazupasubug.pdfIn PDF document text
    • https://site-1037166.mozfiles.com/files/1037166/34218784930.pdfIn PDF document text
    • https://site-1039329.mozfiles.com/files/1039329/10592361687.pdfIn PDF document text
    • https://site-1036815.mozfiles.com/files/1036815/24596603417.pdfIn PDF document text
    • https://site-1038311.mozfiles.com/files/1038311/93749853632.pdfIn PDF document text
    • https://site-1040041.mozfiles.com/files/1040041/manisinagebaxeloseb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/50461856772.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4244/7261/files/a_manual_of_style_for_contract_drafting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0416/8864/files/the_boyfriend_list_e_lockhart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/5443/3183/files/prentice_hall_health_skills_for_wellness_chapter_20_review_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5447/2087/files/subnet_mask_chart_ip_addresses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6711/1584/files/zujebuvunulidi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8326/2869/files/kabujolegobuburenav.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62BB 5752 bytes
SHA-256: 54513a8cdd75924dad869d8fff6746602696078abb5846d9e50649648a704c2a
font_01_sfnt_off0000764c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x764C 9848 bytes
SHA-256: 1505c934980c1ad0276c18c56cfb9599eafe130c9492a3450c3a8be31ef3feb7
font_02_sfnt_off000097fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97FB 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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