Malicious PDF — malware analysis report

Static analysis result for SHA-256 a69af08c424b97e9…

MALICIOUS

PDF

39.3 KB Created: 2020-10-03 04:46:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: dfeb02f734a3929063eb8fc987f4b773 SHA-1: 93bdafd7307c7dbf2060fe94b786803df485b60d SHA-256: a69af08c424b97e9a1632cf5684a7a79d90f9bddaa5d696939f7a2cbe90a9960
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=bon+jovi+livin+on+a+prayer+tab+pdf In PDF document text
    • http://dukuki.northvicgps.com/uploads/1/3/1/3/131380988/dawijag.pdfIn PDF document text
    • http://files.bcarrollconsulting.com/uploads/1/3/2/8/132815220/e4662e34.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/1/0482/0385/8072/files/7695977252.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4033/6793/files/kenawuru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5382/5704/files/analytic_number_theory.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d24c28af-4d3d-4618-a479-2adae2c4306a/kurewazilupukexozex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/037656ee-1267-4eb1-96cc-58215e0d7a1d/35902805518.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/871021db-5663-4861-b19f-d12259c625ec/78276986057.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ff3f847-7613-4c65-8db7-71ea5e5c146c/sukapekuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e5b769e-bf58-4149-8c97-746b1efe20f8/83515926495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9877d86-f941-4107-bfdd-7cd17f24a200/61309741872.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1e2be50-20e3-4b08-b8db-2d4bc2ba3311/neladagilajuresifonufe.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_off00005506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5506 5284 bytes
SHA-256: c7b7b9866f4a8b5151abeef08c93a7252fca3431d1bfd1000c1277d7433646ac
font_01_sfnt_off00006723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6723 13088 bytes
SHA-256: 3f82842976e3c0fc67b4e9f891b35eac3e79d020401c109eb7b9e8eaacfe2374