Malicious PDF — malware analysis report

Static analysis result for SHA-256 da4a5a3cdcf23fab…

MALICIOUS

PDF

40.1 KB Created: 2020-10-07 07:07:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 499a9004e80fd8a9b687da39104fea82 SHA-1: f8fa890ab718ba190b1f38265f010a15f4f12e20 SHA-256: da4a5a3cdcf23fabff185824982f35a1a2f57a8512da26543f65342eb052c5ff
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/pify?keyword=an+invisible+thread+movie In PDF document text
    • http://fazerodeb.imagineigo.com/uploads/1/3/1/8/131856725/6188605.pdfIn PDF document text
    • http://files.sunshineshopgiftbaskets.com/uploads/1/3/1/4/131438693/f5f857590555.pdfIn PDF document text
    • http://files.gracechurch-pcusa.com/uploads/1/3/0/8/130874350/9ed2704f90a5.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/1/0433/8096/5534/files/watch_the_joker_online_free_letmewatchthis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4884/0599/files/10158275799.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0234/6148/files/control_chart_excel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/8741/5446/files/37960743318.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8016/3229/files/solid_rider_2_level_9.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f771b569-053d-45ac-80c8-09adc2fad3ef/74478644587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b82d253-3fbc-4448-ade0-42636aacf163/35039535754.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/943f7ba6-37ce-44f6-8edf-12f205c84ac9/75557557984.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5cd882b-a4cb-4cd3-84d9-ae247c21fd22/tugesodebugesagevo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b6c1f5f-fc25-45f4-b7bd-a6e2d43acc36/kefole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb0ea8c6-970f-4f1e-aee5-0551038869f5/jolotusixuwigugerolevexun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3389580a-74c4-457b-a502-816f4b8b64a7/73066504046.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b120a614-5b77-4d61-8313-09e752c9e312/25176197996.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_off00005f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F83 5252 bytes
SHA-256: 943ff2a5b3802b7cb2fbf6fe452d13be6e2c1e2c1e40de60f109df3419b58646
font_01_sfnt_off00007136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7136 10120 bytes
SHA-256: 1dd3ba07be51dc944960a3328daf948af2916189c4a19c92542eefebc17f97ea

Open this report in the interactive analyzer, or submit your own file for analysis.