Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6ccc2a73df68646…

MALICIOUS

PDF

44.9 KB Created: 2020-10-16 02:33:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2831f7a1645d9a0fdef60b9cd834123f SHA-1: cf884b9b7b7b78e096b1ba55cf29ba513c946e36 SHA-256: a6ccc2a73df6864694283b087f9b072f5ab70f82bea3c17cc22c017f1cda04ca
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://ggtraff.ru/123?keyword=chemistry+class+9+ncert+solutions+pdf In PDF document text
    • https://site-1043239.mozfiles.com/files/1043239/zodevosupufokuridedineva.pdfIn PDF document text
    • https://site-1043086.mozfiles.com/files/1043086/19394985621.pdfIn PDF document text
    • https://site-1037219.mozfiles.com/files/1037219/levinexisomujutidobu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f874b0d05c80.pdfIn PDF document text
    • https://tetoferapijala.weebly.com/uploads/1/3/1/6/131606168/delekek.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/gosibokuvefuj.pdfIn PDF document text
    • https://balejumefem.weebly.com/uploads/1/3/0/8/130814467/zonaxitowenin.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/36ce75ac.pdfIn PDF document text
    • https://dagigokes.weebly.com/uploads/1/3/0/7/130739756/xaxepeson.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1856/5278/files/castlevania_3_draculas_curse_gamefaqs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3413/1655/files/spondylarthrite_ankylosante_traitement.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8127/7345/files/italian_heritage_doll_project.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1147/3059/files/24659344595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6780/8165/files/26912828207.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/5370/7175/files/subway_surfers_hack_apk_an1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/6435/3945/files/horse_trough_planter_near_me.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/6186/9214/files/12353489798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1899730-d09a-4d54-a427-239cc9cd23c7/famodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99639fdf-cf59-476d-8a2c-020d0e45dbea/1102230271.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_off000066f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F2 5556 bytes
SHA-256: 5b54b84fd9c80fed12c98b0264304ce309514f4ab2c7e19fecea963cb9e1c159
font_01_sfnt_off000079aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79AA 9672 bytes
SHA-256: e39f7e2e93ea935e8d7f0784d33741025d81deee6ae6841a7084edd615e070ee
font_02_sfnt_off00009ae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AE7 2748 bytes
SHA-256: ab3609f704e7151de3b0a19f559a0bcc4a991d8e83d803fd30736275b462878f

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