Malicious PDF — malware analysis report

Static analysis result for SHA-256 53222c5656b54576…

MALICIOUS

PDF

40.0 KB Created: 2020-10-08 08:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4a93b3c03abb3eeb73aa6c63170a3627 SHA-1: 1042cb40ad125e77cd7cb67560b57575368a61b3 SHA-256: 53222c5656b545760a585befcedd292842f166437ba0bc8a7e29d8501bc36b7a
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://gettraff.ru/strik?keyword=review+of+shiseido+products In PDF document text
    • http://files.nicholasjozaites.com/uploads/1/3/2/7/132740361/6275544.pdfIn PDF document text
    • http://files.propertymanagementdfw.net/uploads/1/3/0/7/130776074/joxedema.pdfIn PDF document text
    • http://rikegow.matheagerty.com/uploads/1/3/2/6/132681670/29c70a0ebfd8e4.pdfIn PDF document text
    • http://nutemosu.sangsunbae.com/uploads/1/3/0/7/130738918/1970543.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/0f68c360-8cac-4d84-8c7f-62b84f6503b0/83559541710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/024b5575-f09d-450b-a8b8-fcdc6fcf0777/96673669418.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1668/1629/files/fukujejejixibimasusatixi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4835/3442/files/jotoforavexesodojowubegox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/8460/4326/files/36940488407.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3767/3630/files/yellow_dog_village_armstrong_county.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1537/9880/files/71638881169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8068/6495/files/96746375408.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_off00005d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D96 5160 bytes
SHA-256: 897ebaaeb195c403bc57d13a90b1810980e08e894231e43d2af758b293d1b89e
font_01_sfnt_off00006f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F43 10784 bytes
SHA-256: c45ac5415b7869ade98eecf27cb9a01dc7b056269fa74c5e0d728c6a2293c647