Malicious PDF — malware analysis report

Static analysis result for SHA-256 e584be8d49830f85…

MALICIOUS

PDF

42.1 KB Created: 2020-11-07 14:10:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ec89096ba66c7cec0ff99a5b064d2a85 SHA-1: 2eb92005a9ff53c71e082109a651d75eb8ec8c12 SHA-256: e584be8d49830f85556b7adc96cbe10aa2d2452f9922860872c3f4a5d1d76bb0
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a lure for a "gift card free psn" and exhibits characteristics of a link farm, with numerous embedded external URLs. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a large number of external links, suggesting a deceptive or malicious purpose. While no scripts were directly extracted, the presence of embedded URLs and the overall structure point towards a phishing or SEO-based malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=gift+card+free+psn PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370530/normal_5f89c725199aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394077/normal_5f993f8e9fefe.pdfIn PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/zisixapabi.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/danireloj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409616/normal_5f9437c8beb92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376101/normal_5f9e6ef8601e2.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/58727daf-140a-4b6b-9705-6898084c3955/vofufunezefoxumezikix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6b4a751-512c-45ee-aa2c-ce25745deba7/50053939929.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0a563ce-95d5-4c97-8851-e91e729c8466/best_single_torch_butane_lighter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d2179de-35fd-45fa-93a9-cb6e861de554/16635916890.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/47957384196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1007935a-44f1-4949-a55f-34841e389c6f/state_management_in_asp._net.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b16df857-99f8-4948-874b-4b09f277039b/megodinutusazudarir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2023416a-0b02-4d83-badc-5447325a017e/nerisokekosopeditimosu.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/norasofozikejaloto.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_off000063ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63AD 5148 bytes
SHA-256: 179a56941608803d3af22906b977be1c5a70ce489f8deabfba571eb39d1f66a7
font_01_sfnt_off00007544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7544 11256 bytes
SHA-256: e257f35f2d6ed11db73e971b5cf5385d9a352b64ecd1f8730552eee32846dd1b

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