Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b02ae716e84d41a…

MALICIOUS

PDF

39.0 KB Created: 2020-10-16 20:13:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f1b70c4bd4ec58c676d587947aab465e SHA-1: e94cbec0dfdbe41db83c5b88dcaa488f4f65cfae SHA-256: 8b02ae716e84d41a7eef99ff89901fa78d05527c656543cc0994810fd51042a0
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=time+for+turbos In PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/3409757.pdfIn PDF document text
    • https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/7544631.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/fibawubaxavuvabu.pdfIn PDF document text
    • https://seririgikum.weebly.com/uploads/1/3/0/7/130739922/xuzaruvojad.pdfIn PDF document text
    • https://basuxebuj.weebly.com/uploads/1/3/1/3/131379820/4449421.pdfIn PDF document text
    • https://wozuwonasanava.weebly.com/uploads/1/3/1/4/131483955/7310d2.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/duwivif.pdfIn PDF document text
    • https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/e6390254d6.pdfIn PDF document text
    • https://javezevefumutew.weebly.com/uploads/1/3/2/7/132740470/nuzexarejovolibe.pdfIn PDF document text
    • https://gexirirexov.weebly.com/uploads/1/3/0/8/130874239/272811.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/1/0496/1855/0937/files/80725994085.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/4473/2833/files/wine_rack_plans_for_1.5_liter_bottles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/8020/3416/files/automation_production_systems_and_computer-aided_manufacturing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5587/6769/files/58134620940.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4132/4184/files/17246124507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5122/4735/files/16245949244.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2127/0684/files/elumen_hair_color_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3117/4043/files/wafuxaludofubexosomoza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4135/8502/files/the_courage_to_be_disliked_read_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b8b372f-5919-4597-afe5-a4774acda073/28803784898.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2245ff6-5c98-4e42-a9f3-772a55e68362/97745271496.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_off00005b69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B69 4760 bytes
SHA-256: 5f7ae2ca1e3c4882a38102417ffa91ed31d765d64f63482a339b2c131875a56b
font_01_sfnt_off00006b7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7F 10316 bytes
SHA-256: 1a86ac08bf99e3f5ea22a3ce615107171cd23f86d2ccb55e8966e9dd362d21fb

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