Malicious PDF — malware analysis report

Static analysis result for SHA-256 b25e1f5f1d889ca5…

MALICIOUS

PDF

51.7 KB Created: 2020-11-09 04:16:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: f2391122f5695a0ac5761f6c83387bcc SHA-1: 7eaef4b21a524d38bf1ad195ffcee68e936e92cd SHA-256: b25e1f5f1d889ca5acf53721403b0b4f25c3487b50d6bfd204b6b590e86b2da4
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/123?keyword=free+paypal+generator+no+human+verification PDF link annotation
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/dopaviwet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377704/normal_5f9831f9cc5a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411001/normal_5f97dd7fa59d3.pdfIn PDF document text
    • https://ziperivowupidu.weebly.com/uploads/1/3/1/3/131381589/9165060.pdfIn PDF document text
    • https://wesaxewotivaf.weebly.com/uploads/1/3/4/5/134578523/8718223.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wovitiku/who_makes_supertech_oil_filters.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/yahoo_news_john_lewis.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/28744572703.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/computer_network_cables_and_connectors.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2396b1e7-cb9f-4c78-b3e0-061b29c046c0/82191928402.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_off00008b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1D 5368 bytes
SHA-256: 2b56fb0a34d4b2d7c99ea611a9ec5a1b2a0cbdc06d288ba132bf1664fde730f2
font_01_sfnt_off00009d50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D50 10804 bytes
SHA-256: 506588edafc202fa11aca04802a65ccdb91a8c036c94139d4769ca5591135ff2