Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cf309ab0ff2ab1d…

MALICIOUS

PDF

59.7 KB Created: 2020-10-03 13:03:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: b4b5dc6960f87d292e048401e49daa24 SHA-1: 076c967030c2b7d13ccda2fe7b584eaf37ad1f73 SHA-256: 0cf309ab0ff2ab1deda102b6bba2e0b221542425573564bbebeb820b09436d48
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/strik?keyword=intermediate+accounting+kieso+ppt In PDF document text
    • http://zitove.excellsafety.com/uploads/1/3/1/0/131071220/visuwapebariruwene.pdfIn PDF document text
    • http://midoritut.pheasantridgetownhomes.org/uploads/1/3/1/0/131070364/1343131.pdfIn PDF document text
    • http://foboxoval.creatingourreality.com/uploads/1/3/1/4/131407424/2d8022.pdfIn PDF document text
    • http://files.larsenhusby.com/uploads/1/3/0/8/130874058/2572605.pdfIn PDF document text
    • http://files.valleyviewdoodles.com/uploads/1/3/2/6/132695543/sufetesaxofenem.pdfIn PDF document text
    • http://foluga.hombomtoys.net/uploads/1/3/2/6/132681218/b3c0f.pdfIn PDF document text
    • http://files.emilysasia.com/uploads/1/3/1/4/131454286/zoxunutakava.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/1/0482/7902/7873/files/fizezovulepavibokivopef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7955/7539/files/86883050500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2016/3999/files/safety_first_air_car_seat_installation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0808/5144/files/83031301405.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/2447/5299/files/bates_middle_school_danville_ky.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/vuwivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2076/0741/files/intex_spa_pool_manual.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_off0000a12d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA12D 1916 bytes
SHA-256: b43554b517a09e7b85a87df1b7ba39398ead2567f8e577e1603cd21ce4fcc2ed
font_01_sfnt_off0000aa69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA69 5360 bytes
SHA-256: 602684511a2de2ab0c1ee6f0e08facf7d1a5fa8f7906ff91e391911d3123c87d
font_02_sfnt_off0000bc91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC91 10784 bytes
SHA-256: c9bb3e65c70ec2e2873bf938c1d8326f2176cb95841920ea07cc8a880a93ef72