Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c898ff70cf36952…

MALICIOUS

PDF

51.0 KB Created: 2020-10-26 07:43:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 6ab16496e2b23d75efbeea65343a2273 SHA-1: 26e1bf839762f16200d0c5eac81b4ec583ea041b SHA-256: 6c898ff70cf36952a7c88bf06b9cac6f66c84f2f14dbf74dd0263bc3f5492247
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/aws?keyword=brevet+maths+2019+nouvelle+caledonie+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f87143fa193f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372972/normal_5f8c3838dff4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367925/normal_5f8809f6d82e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374983/normal_5f964cc3c6bb7.pdfIn PDF document text
    • https://zuwumepegowivos.weebly.com/uploads/1/3/1/0/131069935/vetuwexirara.pdfIn PDF document text
    • https://viwuwobigoku.weebly.com/uploads/1/3/1/3/131378942/3095810.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/najubu/97148223745.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/96099020671.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/titew.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/rakimibod.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/12567795641.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/robotica_para_nios.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/35660550030.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/working_principle_of_centrifuge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0701/5069/files/93511492984.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2555/8425/files/braun_welch_allyn_pro_6000_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7006/0704/files/dynamics_of_personal_goal_setting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8523/4338/files/96867721963.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4788/6233/files/towesixojorob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/4348/7383/files/81894267214.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3525/7753/files/87248029336.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0076/8930/files/white_marsh_psychiatric.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8340/2909/files/spectrum_tv_guide_nyc_tonight.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7663/9127/files/zokerupizesojidiboso.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4A 5984 bytes
SHA-256: 44d4fa3fa1325dd837edebe17bbf8ba16de3730a28f160fc4dbbbd87fd7f0e25
font_01_sfnt_off0000818d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x818D 11936 bytes
SHA-256: 7716e0e35ce2a3050bc0438d2281eccb99b401e15216459b9c78255a4362d3b4
font_02_sfnt_off0000a969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA969 16100 bytes
SHA-256: 2f70223f17dcf1f6480fec686df0135acd461b25747c6c0a456e74d6e5033278