Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0b7ccdc901eb6a9…

MALICIOUS

PDF

63.7 KB Created: 2020-10-15 15:20:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d06ae6017e2e007c93588fe5f3456e1c SHA-1: 32f00b489d03e70fa579b81c1f6179324de70535 SHA-256: c0b7ccdc901eb6a954a67ec2d04138a58e105a2b591e21c3776756238a9ce8e1
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ggtraff.ru/123?keyword=poor+economics+pdf+%25D9%2585%25D8%25AA%25D8%25B1%25D8%25AC%25D9%2585 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_5f870607baf9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368251/normal_5f876dc9f20a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365627/normal_5f8824f82a5cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5f871bb211109.pdfIn PDF document text
    • https://site-1043487.mozfiles.com/files/1043487/hp_proliant_dl380p_gen8_memory_installation_guide.pdfIn PDF document text
    • https://site-1042987.mozfiles.com/files/1042987/jasijajefujosemup.pdfIn PDF document text
    • https://site-1042510.mozfiles.com/files/1042510/24362764588.pdfIn PDF document text
    • https://site-1037212.mozfiles.com/files/1037212/11815204530.pdfIn PDF document text
    • https://site-1038872.mozfiles.com/files/1038872/11003929488.pdfIn PDF document text
    • https://site-1038949.mozfiles.com/files/1038949/zosam.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/1/0435/5879/7471/files/niall_horan_tour_t_shirt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2790/4165/files/san_jose_ninja_tournament_2018.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5418/6146/files/number_cards_printable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9845/3656/files/4398396942.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8713/3860/files/rabubofolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0485/3402/files/46990459601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2635/2797/files/48_quart_cooler_igloo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7926/9541/files/digisuze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4389/4934/files/what_size_package_fits_in_usps_drop_box.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3413/9546/files/bigo_live_hack_diamond_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/1689/0786/files/buduwedupowafiti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2535/0301/files/linunotikakexetujixov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7619/0361/files/38409039532.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1954/1416/files/unidad_1_etapa_2_mas_practica_answers.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0000c5f8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xC5F8 22912 bytes
SHA-256: 4522b75c9bd7beaa3b3e33530695a33b34714d1bf5d68561e407371ad3fe66ab
font_00_sfnt_off00007a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A80 5060 bytes
SHA-256: f77132f5bc321ec5ffdbc01a0af9198ade561de90f0f526cbc2189f69ed2c625
font_01_sfnt_off00008b94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B94 16728 bytes
SHA-256: 9300ad5b093cfbbc12cd7640fbcdad0af0d7da5b98370cbcca033f004c4a09c7
font_02_sfnt_off0000a307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA307 10160 bytes
SHA-256: 40af62c4d1de3cc4ac39b76ef017e2be8bba7b6e5569eb23a76470c568cc7e61