Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd585a71b322fc63…

MALICIOUS

PDF

42.7 KB Created: 2020-11-03 12:20:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 63068df49d2a667c6e43dd3485aa45cc SHA-1: b07d769332a3a0e5b37d7cab54a01753bad5d638 SHA-256: dd585a71b322fc6325067369d76a59fbf6a084f8b9283cea428b189522387046
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/123?keyword=vayne+s10+guide In PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/c25f730.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_5f980ba876057.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454984/normal_5fa0c6ca69e99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368952/normal_5fa086209479b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379719/normal_5f8da24a3f807.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379971/normal_5f95a7f22e772.pdfIn PDF document text
    • https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/720943.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389097/normal_5f8d660a8e9c2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/22ca49e3-b78a-4979-9cf1-30a46b7d5766/xotumumumoxivu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04c54249-467c-4180-8155-6eb6c671ab51/classics_of_western_philosophy_8th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4de930c2-6fc2-4b73-9480-74557c7579b7/87242033677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe9d46f2-312b-466b-ba8b-af324e8f8d24/11397406882.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_off00006653.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6653 5124 bytes
SHA-256: 6a51cb28b1114e921becd8de2d843fcf426773825f20f9dbe92158ec728249bf
font_01_sfnt_off000077e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77E7 11244 bytes
SHA-256: 116e664828042820862165b05e6db21521389ac53a7d5c75ce081ff2bef5ab24