Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5593fc949558990…

MALICIOUS

PDF

53.7 KB Created: 2020-10-01 18:35:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f902ee5ad091108f2064cdc8e7c5a8fa SHA-1: b4c593801fe58401ef85039233c283c32ff627ef SHA-256: d5593fc949558990b04081b53e244c6eada46f19d947b4f1c975f079eb59b808
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=how+does+a+central+air+conditioning+system+work+pdf In PDF document text
    • https://site-1037228.mozfiles.com/files/1037228/sowinokosojaka.pdfIn PDF document text
    • https://site-1040576.mozfiles.com/files/1040576/foturexepureb.pdfIn PDF document text
    • https://site-1036886.mozfiles.com/files/1036886/wixupu.pdfIn PDF document text
    • http://files.mayflowerimporters.com/uploads/1/3/1/4/131453919/c0088fe.pdfIn PDF document text
    • http://files.ppads.org/uploads/1/3/0/9/130969211/kukar_laxesevobejoro.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/1/0482/2053/6989/files/80443038210.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5153/2963/files/stop_motion_armature_hands.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/3897/4628/files/dwi_lawyers_in_dallas_texas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec382e21-71c7-4f82-b760-eb394962bb53/dowusizudebixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c257afe9-6d88-4ff5-9b0f-eb3d56082fde/77468035408.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_off0000905c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x905C 5692 bytes
SHA-256: 37d68404b29a4c4830c25960c77fe4d816ad3bea6b416381d8ec24409b3f4a80
font_01_sfnt_off0000a3be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3BE 11124 bytes
SHA-256: 5f754001481b6b65ee9e7a142f5659a028877ee6e18b20520baa4e2b3a7f5af9